31379427 has 16 divisors (see below), whose sum is σ = 46752160. Its totient is φ = 20800800.

The previous prime is 31379423. The next prime is 31379449. The reversal of 31379427 is 72497313.

It is not a de Polignac number, because 31379427 - 2² = 31379423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31379391 and 31379400.

It is not an unprimeable number, because it can be changed into a prime (31379423) 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, 1677 + ... + 8097.

It is an arithmetic number, because the mean of its divisors is an integer number (2922010).

Almost surely, 2^31379427 is an apocalyptic number.

31379427 is a deficient number, since it is larger than the sum of its proper divisors (15372733).

31379427 is a wasteful number, since it uses less digits than its factorization.

31379427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6611 (or 6605 counting only the distinct ones).

The product of its digits is 31752, while the sum is 36.

The square root of 31379427 is about 5601.7342850228. The cubic root of 31379427 is about 315.4145109918.

The spelling of 31379427 in words is "thirty-one million, three hundred seventy-nine thousand, four hundred twenty-seven".