31293901 has 2 divisors, whose sum is σ = 31293902. Its totient is φ = 31293900.

The previous prime is 31293887. The next prime is 31293907. The reversal of 31293901 is 10939213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30802500 + 491401 = 5550^2 + 701^2 .

It is a cyclic number.

It is not a de Polignac number, because 31293901 - 2⁹ = 31293389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31293901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31293907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15646950 + 15646951.

It is an arithmetic number, because the mean of its divisors is an integer number (15646951).

Almost surely, 2^31293901 is an apocalyptic number.

It is an amenable number.

31293901 is a deficient number, since it is larger than the sum of its proper divisors (1).

31293901 is an equidigital number, since it uses as much as digits as its factorization.

31293901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 31293901 is about 5594.0951904665. The cubic root of 31293901 is about 315.1276915749.

The spelling of 31293901 in words is "thirty-one million, two hundred ninety-three thousand, nine hundred one".