30591961 has 3 divisors (see below), whose sum is σ = 30597493. Its totient is φ = 30586430.

The previous prime is 30591931. The next prime is 30591989. The reversal of 30591961 is 16919503.

The square root of 30591961 is 5531.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 30591961 - 2⁵ = 30591929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30591931) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2766 + ... + 8296.

Almost surely, 2^30591961 is an apocalyptic number.

30591961 is the 5531-st square number.

30591961 is the 2766-th centered octagonal number.

It is an amenable number.

30591961 is a deficient number, since it is larger than the sum of its proper divisors (5532).

30591961 is an frugal number, since it uses more digits than its factorization.

30591961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11062 (or 5531 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 34.

The cubic root of 30591961 is about 312.7536875473.

The spelling of 30591961 in words is "thirty million, five hundred ninety-one thousand, nine hundred sixty-one".