720919492 has 6 divisors (see below), whose sum is σ = 1261609118. Its totient is φ = 360459744.

The previous prime is 720919487. The next prime is 720919513. The reversal of 720919492 is 294919027.

It can be written as a sum of positive squares in only one way, i.e., 559984896 + 160934596 = 23664^2 + 12686^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90114933 + ... + 90114940.

Almost surely, 2^720919492 is an apocalyptic number.

It is an amenable number.

720919492 is a deficient number, since it is larger than the sum of its proper divisors (540689626).

720919492 is a wasteful number, since it uses less digits than its factorization.

720919492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180229877 (or 180229875 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 720919492 is about 26849.9439850440. The cubic root of 720919492 is about 896.6623255104.

The spelling of 720919492 in words is "seven hundred twenty million, nine hundred nineteen thousand, four hundred ninety-two".