31340417 has 2 divisors, whose sum is σ = 31340418. Its totient is φ = 31340416.

The previous prime is 31340381. The next prime is 31340423. The reversal of 31340417 is 71404313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26460736 + 4879681 = 5144^2 + 2209^2 .

It is a cyclic number.

It is not a de Polignac number, because 31340417 - 2²² = 27146113 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 31340392 and 31340401.

It is not a weakly prime, because it can be changed into another prime (31340447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15670208 + 15670209.

It is an arithmetic number, because the mean of its divisors is an integer number (15670209).

Almost surely, 2^31340417 is an apocalyptic number.

It is an amenable number.

31340417 is a deficient number, since it is larger than the sum of its proper divisors (1).

31340417 is an equidigital number, since it uses as much as digits as its factorization.

31340417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 31340417 is about 5598.2512448085. The cubic root of 31340417 is about 315.2837520459.

The spelling of 31340417 in words is "thirty-one million, three hundred forty thousand, four hundred seventeen".