31790147 has 4 divisors (see below), whose sum is σ = 31803936. Its totient is φ = 31776360.

The previous prime is 31790111. The next prime is 31790167. The reversal of 31790147 is 74109713.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74109713 = 131 ⋅565723.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31790147 is a prime.

It is a super-2 number, since 2×31790147² = 2021226892563218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31790167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2504 + ... + 8357.

It is an arithmetic number, because the mean of its divisors is an integer number (7950984).

Almost surely, 2^31790147 is an apocalyptic number.

31790147 is a deficient number, since it is larger than the sum of its proper divisors (13789).

31790147 is a wasteful number, since it uses less digits than its factorization.

31790147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13788.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 31790147 is about 5638.2751795208. The cubic root of 31790147 is about 316.7846859573.

The spelling of 31790147 in words is "thirty-one million, seven hundred ninety thousand, one hundred forty-seven".