31450997 has 2 divisors, whose sum is σ = 31450998. Its totient is φ = 31450996.

The previous prime is 31450967. The next prime is 31451029. The reversal of 31450997 is 79905413.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19018321 + 12432676 = 4361^2 + 3526^2 .

It is a cyclic number.

It is not a de Polignac number, because 31450997 - 2¹⁶ = 31385461 is a prime.

It is a super-3 number, since 3×31450997³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31450997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31450967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15725498 + 15725499.

It is an arithmetic number, because the mean of its divisors is an integer number (15725499).

Almost surely, 2^31450997 is an apocalyptic number.

It is an amenable number.

31450997 is a deficient number, since it is larger than the sum of its proper divisors (1).

31450997 is an equidigital number, since it uses as much as digits as its factorization.

31450997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 31450997 is about 5608.1188468149. The cubic root of 31450997 is about 315.6541273907.

The spelling of 31450997 in words is "thirty-one million, four hundred fifty thousand, nine hundred ninety-seven".