715402009 has 9 divisors (see below), whose sum is σ = 832420191. Its totient is φ = 613041240.

The previous prime is 715402001. The next prime is 715402013. The reversal of 715402009 is 900204517.

It is a happy number.

The square root of 715402009 is 26747.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 642470409 + 72931600 = 25347^2 + 8540^2 .

It is not a de Polignac number, because 715402009 - 2³ = 715402001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (715402001) 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 8 ways as a sum of consecutive naturals, for example, 185319 + ... + 189139.

Almost surely, 2^715402009 is an apocalyptic number.

715402009 is the 26747-th square number.

715402009 is the 13374-th centered octagonal number.

It is an amenable number.

715402009 is a deficient number, since it is larger than the sum of its proper divisors (117018182).

715402009 is an frugal number, since it uses more digits than its factorization.

715402009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7656 (or 3828 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The cubic root of 715402009 is about 894.3689606257.

The spelling of 715402009 in words is "seven hundred fifteen million, four hundred two thousand, nine".