720919412 has 6 divisors (see below), whose sum is σ = 1261608978. Its totient is φ = 360459704.

The previous prime is 720919403. The next prime is 720919481. The reversal of 720919412 is 214919027.

It can be written as a sum of positive squares in only one way, i.e., 667395556 + 53523856 = 25834^2 + 7316^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90114923 + ... + 90114930.

It is an arithmetic number, because the mean of its divisors is an integer number (210268163).

Almost surely, 2^720919412 is an apocalyptic number.

It is an amenable number.

720919412 is a deficient number, since it is larger than the sum of its proper divisors (540689566).

720919412 is a wasteful number, since it uses less digits than its factorization.

720919412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180229857 (or 180229855 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 720919412 is about 26849.9424952829. The cubic root of 720919412 is about 896.6622923430.

The spelling of 720919412 in words is "seven hundred twenty million, nine hundred nineteen thousand, four hundred twelve".