31380907 has 8 divisors (see below), whose sum is σ = 31865600. Its totient is φ = 30899880.

The previous prime is 31380893. The next prime is 31380931. The reversal of 31380907 is 70908313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31380907 is a prime.

It is a super-2 number, since 2×31380907² = 1969522648285298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31380607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19732 + ... + 21262.

It is an arithmetic number, because the mean of its divisors is an integer number (3983200).

Almost surely, 2^31380907 is an apocalyptic number.

31380907 is a deficient number, since it is larger than the sum of its proper divisors (484693).

31380907 is a wasteful number, since it uses less digits than its factorization.

31380907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1833.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 31380907 is about 5601.8663854112. The cubic root of 31380907 is about 315.4194697199.

The spelling of 31380907 in words is "thirty-one million, three hundred eighty thousand, nine hundred seven".