716087989 has 2 divisors, whose sum is σ = 716087990. Its totient is φ = 716087988.

The previous prime is 716087971. The next prime is 716088019. The reversal of 716087989 is 989780617.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 623351089 + 92736900 = 24967^2 + 9630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-716087989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (716087909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 358043994 + 358043995.

It is an arithmetic number, because the mean of its divisors is an integer number (358043995).

Almost surely, 2^716087989 is an apocalyptic number.

It is an amenable number.

716087989 is a deficient number, since it is larger than the sum of its proper divisors (1).

716087989 is an equidigital number, since it uses as much as digits as its factorization.

716087989 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 716087989 is about 26759.8204216695. The cubic root of 716087989 is about 894.6547315258.

It can be divided in two parts, 71608 and 7989, that added together give a palindrome (79597).

The spelling of 716087989 in words is "seven hundred sixteen million, eighty-seven thousand, nine hundred eighty-nine".