30631901 has 2 divisors, whose sum is σ = 30631902. Its totient is φ = 30631900.

The previous prime is 30631829. The next prime is 30631903. The reversal of 30631901 is 10913603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30525625 + 106276 = 5525^2 + 326^2 .

It is a cyclic number.

It is not a de Polignac number, because 30631901 - 2¹⁰ = 30630877 is a prime.

Together with 30631903, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30631903) 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 as a sum of consecutive naturals, namely, 15315950 + 15315951.

It is an arithmetic number, because the mean of its divisors is an integer number (15315951).

Almost surely, 2^30631901 is an apocalyptic number.

It is an amenable number.

30631901 is a deficient number, since it is larger than the sum of its proper divisors (1).

30631901 is an equidigital number, since it uses as much as digits as its factorization.

30631901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 30631901 is about 5534.6093809771. The cubic root of 30631901 is about 312.8897358171.

The spelling of 30631901 in words is "thirty million, six hundred thirty-one thousand, nine hundred one".