715042309 has 2 divisors, whose sum is σ = 715042310. Its totient is φ = 715042308.

The previous prime is 715042303. The next prime is 715042343. The reversal of 715042309 is 903240517.

715042309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 681053409 + 33988900 = 26097^2 + 5830^2 .

It is an emirp because it is prime and its reverse (903240517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 715042309 - 2³ = 715042301 is a prime.

It is a super-2 number, since 2×715042309² = 1022571007320102962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (715042301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 357521154 + 357521155.

It is an arithmetic number, because the mean of its divisors is an integer number (357521155).

Almost surely, 2^715042309 is an apocalyptic number.

It is an amenable number.

715042309 is a deficient number, since it is larger than the sum of its proper divisors (1).

715042309 is an equidigital number, since it uses as much as digits as its factorization.

715042309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 715042309 is about 26740.2750359827. The cubic root of 715042309 is about 894.2190409799.

The spelling of 715042309 in words is "seven hundred fifteen million, forty-two thousand, three hundred nine".