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12877997 = 111170727
BaseRepresentation
bin110001001000…
…000010101101
3220020021021212
4301020002231
511244043442
61140004205
7214314116
oct61100255
926207255
1012877997
1172a6480
124390665
13288b822
1419d320d
1511e5a82
hexc480ad

12877997 has 4 divisors (see below), whose sum is σ = 14048736. Its totient is φ = 11707260.

The previous prime is 12877981. The next prime is 12878017. The reversal of 12877997 is 79977821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12877997 - 24 = 12877981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12877957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 585353 + ... + 585374.

It is an arithmetic number, because the mean of its divisors is an integer number (3512184).

Almost surely, 212877997 is an apocalyptic number.

It is an amenable number.

12877997 is a deficient number, since it is larger than the sum of its proper divisors (1170739).

12877997 is a wasteful number, since it uses less digits than its factorization.

12877997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170738.

The product of its digits is 444528, while the sum is 50.

The square root of 12877997 is about 3588.5926210703. The cubic root of 12877997 is about 234.3955918382.

It can be divided in two parts, 128 and 77997, that added together give a 7-th power (78125 = 57).

The spelling of 12877997 in words is "twelve million, eight hundred seventy-seven thousand, nine hundred ninety-seven".

Divisors: 1 11 1170727 12877997