722145737 has 4 divisors (see below), whose sum is σ = 764624916. Its totient is φ = 679666560.

The previous prime is 722145731. The next prime is 722145763. The reversal of 722145737 is 737541227.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 632824336 + 89321401 = 25156^2 + 9451^2 .

It is a cyclic number.

It is not a de Polignac number, because 722145737 - 2⁸ = 722145481 is a prime.

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 722145737.

It is not an unprimeable number, because it can be changed into a prime (722145731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21239564 + ... + 21239597.

It is an arithmetic number, because the mean of its divisors is an integer number (191156229).

Almost surely, 2^722145737 is an apocalyptic number.

It is an amenable number.

722145737 is a deficient number, since it is larger than the sum of its proper divisors (42479179).

722145737 is a wasteful number, since it uses less digits than its factorization.

722145737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42479178.

The product of its digits is 82320, while the sum is 38.

The square root of 722145737 is about 26872.7694330153. The cubic root of 722145737 is about 897.1704288801.

The spelling of 722145737 in words is "seven hundred twenty-two million, one hundred forty-five thousand, seven hundred thirty-seven".