718719421 has 8 divisors (see below), whose sum is σ = 869711040. Its totient is φ = 579807168.

The previous prime is 718719401. The next prime is 718719431. The reversal of 718719421 is 124917817.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 718719421 - 2⁵ = 718719389 is a prime.

It is a super-2 number, since 2×718719421² = 1033115212245150482, 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 (718719401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3019711 + ... + 3019948.

It is an arithmetic number, because the mean of its divisors is an integer number (108713880).

Almost surely, 2^718719421 is an apocalyptic number.

It is an amenable number.

718719421 is a deficient number, since it is larger than the sum of its proper divisors (150991619).

718719421 is a wasteful number, since it uses less digits than its factorization.

718719421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6039683.

The product of its digits is 28224, while the sum is 40.

The square root of 718719421 is about 26808.9429295524. The cubic root of 718719421 is about 895.7492642671.

The spelling of 718719421 in words is "seven hundred eighteen million, seven hundred nineteen thousand, four hundred twenty-one".