31480979 has 4 divisors (see below), whose sum is σ = 32566560. Its totient is φ = 30395400.

The previous prime is 31480973. The next prime is 31481011. The reversal of 31480979 is 97908413.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97908413 = 79 ⋅1239347.

It is a cyclic number.

It is not a de Polignac number, because 31480979 - 2⁴ = 31480963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31480973) 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, 542747 + ... + 542804.

It is an arithmetic number, because the mean of its divisors is an integer number (8141640).

Almost surely, 2^31480979 is an apocalyptic number.

31480979 is a deficient number, since it is larger than the sum of its proper divisors (1085581).

31480979 is a wasteful number, since it uses less digits than its factorization.

31480979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085580.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 31480979 is about 5610.7912989168. The cubic root of 31480979 is about 315.7543991069.

The spelling of 31480979 in words is "thirty-one million, four hundred eighty thousand, nine hundred seventy-nine".