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99879974 = 249939987
BaseRepresentation
bin1011111010000…
…00110000100110
320221221102120022
411331000300212
5201032124344
613524435142
72321652155
oct575006046
9227842508
1099879974
115141a337
1229548ab2
1317900c9c
14d39d59c
158b7e0ee
hex5f40c26

99879974 has 4 divisors (see below), whose sum is σ = 149819964. Its totient is φ = 49939986.

The previous prime is 99879971. The next prime is 99879991. The reversal of 99879974 is 47997899.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47997899 = 337142427.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99879971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24969992 + ... + 24969995.

It is an arithmetic number, because the mean of its divisors is an integer number (37454991).

Almost surely, 299879974 is an apocalyptic number.

99879974 is a deficient number, since it is larger than the sum of its proper divisors (49939990).

99879974 is a wasteful number, since it uses less digits than its factorization.

99879974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49939989.

The product of its digits is 10287648, while the sum is 62.

The square root of 99879974 is about 9993.9968981384. The cubic root of 99879974 is about 463.9731052336.

Adding to 99879974 its sum of digits (62), we get a square (99880036 = 99942).

The spelling of 99879974 in words is "ninety-nine million, eight hundred seventy-nine thousand, nine hundred seventy-four".

Divisors: 1 2 49939987 99879974