31486977 has 12 divisors (see below), whose sum is σ = 47458944. Its totient is φ = 20078520.

The previous prime is 31486967. The next prime is 31486981. The reversal of 31486977 is 77968413.

It is not a de Polignac number, because 31486977 - 2¹⁰ = 31485953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31486927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75849 + ... + 76262.

It is an arithmetic number, because the mean of its divisors is an integer number (3954912).

Almost surely, 2^31486977 is an apocalyptic number.

It is an amenable number.

31486977 is a deficient number, since it is larger than the sum of its proper divisors (15971967).

31486977 is a wasteful number, since it uses less digits than its factorization.

31486977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152140 (or 152137 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 31486977 is about 5611.3257791720. The cubic root of 31486977 is about 315.7744511582.

The spelling of 31486977 in words is "thirty-one million, four hundred eighty-six thousand, nine hundred seventy-seven".