12791690 has 16 divisors (see below), whose sum is σ = 23195592. Its totient is φ = 5078784.

The previous prime is 12791687. The next prime is 12791773. The reversal of 12791690 is 9619721.

12791690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 12538681 + 253009 = 3541^2 + 503^2 .

It is a super-2 number, since 2×12791690² = 327254666112200, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12791690.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3299 + ... + 6038.

Almost surely, 2^12791690 is an apocalyptic number.

12791690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12791690 is a deficient number, since it is larger than the sum of its proper divisors (10403902).

12791690 is a wasteful number, since it uses less digits than its factorization.

12791690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9481.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 12791690 is about 3576.5472176388. The cubic root of 12791690 is about 233.8707860411.

The spelling of 12791690 in words is "twelve million, seven hundred ninety-one thousand, six hundred ninety".