961929817 has 2 divisors, whose sum is σ = 961929818. Its totient is φ = 961929816.

The previous prime is 961929763. The next prime is 961929821. The reversal of 961929817 is 718929169.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 945193536 + 16736281 = 30744^2 + 4091^2 .

It is a cyclic number.

It is not a de Polignac number, because 961929817 - 2¹⁵ = 961897049 is a prime.

It is not a weakly prime, because it can be changed into another prime (961929847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480964908 + 480964909.

It is an arithmetic number, because the mean of its divisors is an integer number (480964909).

Almost surely, 2^961929817 is an apocalyptic number.

It is an amenable number.

961929817 is a deficient number, since it is larger than the sum of its proper divisors (1).

961929817 is an equidigital number, since it uses as much as digits as its factorization.

961929817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 52.

The square root of 961929817 is about 31014.9934225368. The cubic root of 961929817 is about 987.1454064584.

The spelling of 961929817 in words is "nine hundred sixty-one million, nine hundred twenty-nine thousand, eight hundred seventeen".