670961693 has 2 divisors, whose sum is σ = 670961694. Its totient is φ = 670961692.

The previous prime is 670961659. The next prime is 670961699. The reversal of 670961693 is 396169076.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 661364089 + 9597604 = 25717^2 + 3098^2 .

It is a cyclic number.

It is not a de Polignac number, because 670961693 - 2¹⁶ = 670896157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670961699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335480846 + 335480847.

It is an arithmetic number, because the mean of its divisors is an integer number (335480847).

Almost surely, 2^670961693 is an apocalyptic number.

It is an amenable number.

670961693 is a deficient number, since it is larger than the sum of its proper divisors (1).

670961693 is an equidigital number, since it uses as much as digits as its factorization.

670961693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 367416, while the sum is 47.

The square root of 670961693 is about 25902.9282707573. The cubic root of 670961693 is about 875.4524758550.

The spelling of 670961693 in words is "six hundred seventy million, nine hundred sixty-one thousand, six hundred ninety-three".