961664413 has 4 divisors (see below), whose sum is σ = 964285120. Its totient is φ = 959043708.

The previous prime is 961664401. The next prime is 961664441. The reversal of 961664413 is 314466169.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 961664413 - 2¹⁷ = 961533341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961664453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1309803 + ... + 1310536.

It is an arithmetic number, because the mean of its divisors is an integer number (241071280).

Almost surely, 2^961664413 is an apocalyptic number.

It is an amenable number.

961664413 is a deficient number, since it is larger than the sum of its proper divisors (2620707).

961664413 is a wasteful number, since it uses less digits than its factorization.

961664413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2620706.

The product of its digits is 93312, while the sum is 40.

The square root of 961664413 is about 31010.7144870930. The cubic root of 961664413 is about 987.0546110477.

The spelling of 961664413 in words is "nine hundred sixty-one million, six hundred sixty-four thousand, four hundred thirteen".