715805891 has 2 divisors, whose sum is σ = 715805892. Its totient is φ = 715805890.

The previous prime is 715805879. The next prime is 715805897. The reversal of 715805891 is 198508517.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 715805891 - 2¹⁰ = 715804867 is a prime.

It is not a weakly prime, because it can be changed into another prime (715805897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 357902945 + 357902946.

It is an arithmetic number, because the mean of its divisors is an integer number (357902946).

Almost surely, 2^715805891 is an apocalyptic number.

715805891 is a deficient number, since it is larger than the sum of its proper divisors (1).

715805891 is an equidigital number, since it uses as much as digits as its factorization.

715805891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 44.

The square root of 715805891 is about 26754.5489776972. The cubic root of 715805891 is about 894.5372350437.

The spelling of 715805891 in words is "seven hundred fifteen million, eight hundred five thousand, eight hundred ninety-one".