961499491 has 2 divisors, whose sum is σ = 961499492. Its totient is φ = 961499490.

The previous prime is 961499489. The next prime is 961499531. The reversal of 961499491 is 194994169.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 961499491 - 2¹ = 961499489 is a prime.

Together with 961499489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (961499401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480749745 + 480749746.

It is an arithmetic number, because the mean of its divisors is an integer number (480749746).

Almost surely, 2^961499491 is an apocalyptic number.

961499491 is a deficient number, since it is larger than the sum of its proper divisors (1).

961499491 is an equidigital number, since it uses as much as digits as its factorization.

961499491 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 961499491 is about 31008.0552598837. The cubic root of 961499491 is about 986.9981823791.

The spelling of 961499491 in words is "nine hundred sixty-one million, four hundred ninety-nine thousand, four hundred ninety-one".