716490781 has 4 divisors (see below), whose sum is σ = 716962752. Its totient is φ = 716018812.

The previous prime is 716490767. The next prime is 716490793. The reversal of 716490781 is 187094617.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 187094617 = 1423 ⋅131479.

It is a cyclic number.

It is not a de Polignac number, because 716490781 - 2²⁷ = 582273053 is a prime.

It is a super-2 number, since 2×716490781² = 1026718078515979922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (716490751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233701 + ... + 236746.

It is an arithmetic number, because the mean of its divisors is an integer number (179240688).

Almost surely, 2^716490781 is an apocalyptic number.

It is an amenable number.

716490781 is a deficient number, since it is larger than the sum of its proper divisors (471971).

716490781 is a wasteful number, since it uses less digits than its factorization.

716490781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471970.

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 716490781 is about 26767.3454231084. The cubic root of 716490781 is about 894.8224447255.

The spelling of 716490781 in words is "seven hundred sixteen million, four hundred ninety thousand, seven hundred eighty-one".