719409981 has 8 divisors (see below), whose sum is σ = 985138144. Its totient is φ = 466644240.

The previous prime is 719409979. The next prime is 719409991. The reversal of 719409981 is 189904917.

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

It is not a de Polignac number, because 719409981 - 2¹ = 719409979 is a prime.

It is a super-2 number, since 2×719409981² = 1035101441524840722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 719409981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (719409991) 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, 3240475 + ... + 3240696.

It is an arithmetic number, because the mean of its divisors is an integer number (123142268).

Almost surely, 2^719409981 is an apocalyptic number.

It is an amenable number.

719409981 is a deficient number, since it is larger than the sum of its proper divisors (265728163).

719409981 is a wasteful number, since it uses less digits than its factorization.

719409981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6481211.

The product of its (nonzero) digits is 163296, while the sum is 48.

The square root of 719409981 is about 26821.8191217523. The cubic root of 719409981 is about 896.0360570397.

The spelling of 719409981 in words is "seven hundred nineteen million, four hundred nine thousand, nine hundred eighty-one".