961936819 has 2 divisors, whose sum is σ = 961936820. Its totient is φ = 961936818.

The previous prime is 961936813. The next prime is 961936919. The reversal of 961936819 is 918639169.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 961936819 - 2⁷ = 961936691 is a prime.

It is a super-2 number, since 2×961936819² = 1850644887495677522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (961936813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480968409 + 480968410.

It is an arithmetic number, because the mean of its divisors is an integer number (480968410).

Almost surely, 2^961936819 is an apocalyptic number.

961936819 is a deficient number, since it is larger than the sum of its proper divisors (1).

961936819 is an equidigital number, since it uses as much as digits as its factorization.

961936819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 629856, while the sum is 52.

The square root of 961936819 is about 31015.1063032194. The cubic root of 961936819 is about 987.1478016350.

The spelling of 961936819 in words is "nine hundred sixty-one million, nine hundred thirty-six thousand, eight hundred nineteen".