31420793 has 2 divisors, whose sum is σ = 31420794. Its totient is φ = 31420792.

The previous prime is 31420787. The next prime is 31420817. The reversal of 31420793 is 39702413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25030009 + 6390784 = 5003^2 + 2528^2 .

It is a cyclic number.

It is not a de Polignac number, because 31420793 - 2¹⁰ = 31419769 is a prime.

It is not a weakly prime, because it can be changed into another prime (31420703) 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, 15710396 + 15710397.

It is an arithmetic number, because the mean of its divisors is an integer number (15710397).

Almost surely, 2^31420793 is an apocalyptic number.

It is an amenable number.

31420793 is a deficient number, since it is larger than the sum of its proper divisors (1).

31420793 is an equidigital number, since it uses as much as digits as its factorization.

31420793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 31420793 is about 5605.4253183858. The cubic root of 31420793 is about 315.5530487625.

The spelling of 31420793 in words is "thirty-one million, four hundred twenty thousand, seven hundred ninety-three".