915961 has 2 divisors, whose sum is σ = 915962. Its totient is φ = 915960.

The previous prime is 915949. The next prime is 915973. The reversal of 915961 is 169519.

It is a balanced prime because it is at equal distance from previous prime (915949) and next prime (915973).

It can be written as a sum of positive squares in only one way, i.e., 913936 + 2025 = 956^2 + 45^2 .

It is a cyclic number.

It is not a de Polignac number, because 915961 - 2¹⁵ = 883193 is a prime.

It is not a weakly prime, because it can be changed into another prime (915911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 457980 + 457981.

It is an arithmetic number, because the mean of its divisors is an integer number (457981).

2⁹¹⁵⁹⁶¹ is an apocalyptic number.

It is an amenable number.

915961 is a deficient number, since it is larger than the sum of its proper divisors (1).

915961 is an equidigital number, since it uses as much as digits as its factorization.

915961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2430, while the sum is 31.

The square root of 915961 is about 957.0585144076. The cubic root of 915961 is about 97.1163446143.

The spelling of 915961 in words is "nine hundred fifteen thousand, nine hundred sixty-one".