701687989 has 2 divisors, whose sum is σ = 701687990. Its totient is φ = 701687988.

The previous prime is 701687953. The next prime is 701687999. The reversal of 701687989 is 989786107.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 543356100 + 158331889 = 23310^2 + 12583^2 .

It is a cyclic number.

It is not a de Polignac number, because 701687989 - 2⁹ = 701687477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (701687939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 350843994 + 350843995.

It is an arithmetic number, because the mean of its divisors is an integer number (350843995).

Almost surely, 2^701687989 is an apocalyptic number.

It is an amenable number.

701687989 is a deficient number, since it is larger than the sum of its proper divisors (1).

701687989 is an equidigital number, since it uses as much as digits as its factorization.

701687989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1524096, while the sum is 55.

The square root of 701687989 is about 26489.3938964258. The cubic root of 701687989 is about 888.6171298759.

The spelling of 701687989 in words is "seven hundred one million, six hundred eighty-seven thousand, nine hundred eighty-nine".