15838961 has 2 divisors, whose sum is σ = 15838962. Its totient is φ = 15838960.

The previous prime is 15838957. The next prime is 15838993. The reversal of 15838961 is 16983851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14868736 + 970225 = 3856^2 + 985^2 .

It is a cyclic number.

It is not a de Polignac number, because 15838961 - 2² = 15838957 is a prime.

It is not a weakly prime, because it can be changed into another prime (15838261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7919480 + 7919481.

It is an arithmetic number, because the mean of its divisors is an integer number (7919481).

Almost surely, 2^15838961 is an apocalyptic number.

It is an amenable number.

15838961 is a deficient number, since it is larger than the sum of its proper divisors (1).

15838961 is an equidigital number, since it uses as much as digits as its factorization.

15838961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 41.

The square root of 15838961 is about 3979.8192169997. The cubic root of 15838961 is about 251.1359559320.

The spelling of 15838961 in words is "fifteen million, eight hundred thirty-eight thousand, nine hundred sixty-one".