30997479 has 16 divisors (see below), whose sum is σ = 42624000. Its totient is φ = 20028096.

The previous prime is 30997457. The next prime is 30997501. The reversal of 30997479 is 97479903.

It is an interprime number because it is at equal distance from previous prime (30997457) and next prime (30997501).

It is not a de Polignac number, because 30997479 - 2²⁴ = 14220263 is a prime.

It is a super-4 number, since 4×30997479⁴ (a number of 31 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30997079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11722 + ... + 14120.

It is an arithmetic number, because the mean of its divisors is an integer number (2664000).

Almost surely, 2^30997479 is an apocalyptic number.

30997479 is a deficient number, since it is larger than the sum of its proper divisors (11626521).

30997479 is a wasteful number, since it uses less digits than its factorization.

30997479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2534.

The product of its (nonzero) digits is 428652, while the sum is 48.

The square root of 30997479 is about 5567.5379657439. The cubic root of 30997479 is about 314.1295495022.

The spelling of 30997479 in words is "thirty million, nine hundred ninety-seven thousand, four hundred seventy-nine".