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99911837 = 5313732
BaseRepresentation
bin1011111010010…
…00100010011101
320222000001021102
411331020202131
5201034134322
613525242445
72322144104
oct575104235
9228001242
1099911837
1151441273
1229563425
131791263c
14d3ab03b
158b88792
hex5f4889d

99911837 has 6 divisors (see below), whose sum is σ = 101871162. Its totient is φ = 97955312.

The previous prime is 99911827. The next prime is 99911849. The reversal of 99911837 is 73811999.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 85729081 + 14182756 = 9259^2 + 3766^2 .

It is not a de Polignac number, because 99911837 - 24 = 99911821 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99911791 and 99911800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99911827) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72083 + ... + 73455.

It is an arithmetic number, because the mean of its divisors is an integer number (16978527).

Almost surely, 299911837 is an apocalyptic number.

It is an amenable number.

99911837 is a deficient number, since it is larger than the sum of its proper divisors (1959325).

99911837 is an frugal number, since it uses more digits than its factorization.

99911837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2799 (or 1426 counting only the distinct ones).

The product of its digits is 122472, while the sum is 47.

The square root of 99911837 is about 9995.5908779822. The cubic root of 99911837 is about 464.0224377898.

The spelling of 99911837 in words is "ninety-nine million, nine hundred eleven thousand, eight hundred thirty-seven".

Divisors: 1 53 1373 72769 1885129 99911837