961813519 has 2 divisors, whose sum is σ = 961813520. Its totient is φ = 961813518.

The previous prime is 961813469. The next prime is 961813529. The reversal of 961813519 is 915318169.

It is a strong prime.

It is an emirp because it is prime and its reverse (915318169) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 961813519 - 2⁹ = 961813007 is a prime.

It is a super-2 number, since 2×961813519² = 1850170490662326722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (961813529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480906759 + 480906760.

It is an arithmetic number, because the mean of its divisors is an integer number (480906760).

Almost surely, 2^961813519 is an apocalyptic number.

961813519 is a deficient number, since it is larger than the sum of its proper divisors (1).

961813519 is an equidigital number, since it uses as much as digits as its factorization.

961813519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 43.

The square root of 961813519 is about 31013.1184984677. The cubic root of 961813519 is about 987.1056226608.

The spelling of 961813519 in words is "nine hundred sixty-one million, eight hundred thirteen thousand, five hundred nineteen".