31613401 has 2 divisors, whose sum is σ = 31613402. Its totient is φ = 31613400.

The previous prime is 31613399. The next prime is 31613411. The reversal of 31613401 is 10431613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18071001 + 13542400 = 4251^2 + 3680^2 .

It is a cyclic number.

It is not a de Polignac number, because 31613401 - 2¹ = 31613399 is a prime.

Together with 31613399, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31613411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15806700 + 15806701.

It is an arithmetic number, because the mean of its divisors is an integer number (15806701).

Almost surely, 2^31613401 is an apocalyptic number.

It is an amenable number.

31613401 is a deficient number, since it is larger than the sum of its proper divisors (1).

31613401 is an equidigital number, since it uses as much as digits as its factorization.

31613401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 31613401 is about 5622.5795681342. The cubic root of 31613401 is about 316.1965109222.

The spelling of 31613401 in words is "thirty-one million, six hundred thirteen thousand, four hundred one".