15690613 has 2 divisors, whose sum is σ = 15690614. Its totient is φ = 15690612.

The previous prime is 15690601. The next prime is 15690641. The reversal of 15690613 is 31609651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15350724 + 339889 = 3918^2 + 583^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15690613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15690673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7845306 + 7845307.

It is an arithmetic number, because the mean of its divisors is an integer number (7845307).

Almost surely, 2^15690613 is an apocalyptic number.

It is an amenable number.

15690613 is a deficient number, since it is larger than the sum of its proper divisors (1).

15690613 is an equidigital number, since it uses as much as digits as its factorization.

15690613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 15690613 is about 3961.1378415804. The cubic root of 15690613 is about 250.3494473187.

The spelling of 15690613 in words is "fifteen million, six hundred ninety thousand, six hundred thirteen".