331720607 has 2 divisors, whose sum is σ = 331720608. Its totient is φ = 331720606.

The previous prime is 331720583. The next prime is 331720633. The reversal of 331720607 is 706027133.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 331720607 - 2⁸ = 331720351 is a prime.

It is a super-3 number, since 3×331720607³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 331720607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331726607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165860303 + 165860304.

It is an arithmetic number, because the mean of its divisors is an integer number (165860304).

Almost surely, 2^331720607 is an apocalyptic number.

331720607 is a deficient number, since it is larger than the sum of its proper divisors (1).

331720607 is an equidigital number, since it uses as much as digits as its factorization.

331720607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292, while the sum is 29.

The square root of 331720607 is about 18213.1987031383. The cubic root of 331720607 is about 692.2412641483.

The spelling of 331720607 in words is "three hundred thirty-one million, seven hundred twenty thousand, six hundred seven".