961899331 has 4 divisors (see below), whose sum is σ = 968920632. Its totient is φ = 954878032.

The previous prime is 961899313. The next prime is 961899391. The reversal of 961899331 is 133998169.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 961899331 - 2⁵ = 961899299 is a prime.

It is a super-2 number, since 2×961899331² = 1850500645956495122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (961899391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3510445 + ... + 3510718.

It is an arithmetic number, because the mean of its divisors is an integer number (242230158).

Almost surely, 2^961899331 is an apocalyptic number.

961899331 is a deficient number, since it is larger than the sum of its proper divisors (7021301).

961899331 is a wasteful number, since it uses less digits than its factorization.

961899331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7021300.

The product of its digits is 314928, while the sum is 49.

The square root of 961899331 is about 31014.5019466700. The cubic root of 961899331 is about 987.1349779662.

The spelling of 961899331 in words is "nine hundred sixty-one million, eight hundred ninety-nine thousand, three hundred thirty-one".