12697990 has 16 divisors (see below), whose sum is σ = 23343552. Its totient is φ = 4970944.

The previous prime is 12697981. The next prime is 12697999. The reversal of 12697990 is 9979621.

It is an interprime number because it is at equal distance from previous prime (12697981) and next prime (12697999).

It is a super-2 number, since 2×12697990² = 322477900080200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12697999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13039 + ... + 13978.

It is an arithmetic number, because the mean of its divisors is an integer number (1458972).

Almost surely, 2^12697990 is an apocalyptic number.

12697990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12697990 is a deficient number, since it is larger than the sum of its proper divisors (10645562).

12697990 is a wasteful number, since it uses less digits than its factorization.

12697990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27071.

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 12697990 is about 3563.4239152815. The cubic root of 12697990 is about 233.2983462281.

The spelling of 12697990 in words is "twelve million, six hundred ninety-seven thousand, nine hundred ninety".