15940313 has 2 divisors, whose sum is σ = 15940314. Its totient is φ = 15940312.

The previous prime is 15940307. The next prime is 15940319. The reversal of 15940313 is 31304951.

It is a balanced prime because it is at equal distance from previous prime (15940307) and next prime (15940319).

It can be written as a sum of positive squares in only one way, i.e., 14531344 + 1408969 = 3812^2 + 1187^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15940313 is a prime.

It is not a weakly prime, because it can be changed into another prime (15940319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7970156 + 7970157.

It is an arithmetic number, because the mean of its divisors is an integer number (7970157).

Almost surely, 2^15940313 is an apocalyptic number.

It is an amenable number.

15940313 is a deficient number, since it is larger than the sum of its proper divisors (1).

15940313 is an equidigital number, since it uses as much as digits as its factorization.

15940313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 15940313 is about 3992.5321539093. The cubic root of 15940313 is about 251.6704824259.

The spelling of 15940313 in words is "fifteen million, nine hundred forty thousand, three hundred thirteen".