70739891 has 2 divisors, whose sum is σ = 70739892. Its totient is φ = 70739890.

The previous prime is 70739863. The next prime is 70739917. The reversal of 70739891 is 19893707.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70739891 - 2⁶ = 70739827 is a prime.

It is not a weakly prime, because it can be changed into another prime (70739791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35369945 + 35369946.

It is an arithmetic number, because the mean of its divisors is an integer number (35369946).

Almost surely, 2^70739891 is an apocalyptic number.

70739891 is a deficient number, since it is larger than the sum of its proper divisors (1).

70739891 is an equidigital number, since it uses as much as digits as its factorization.

70739891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 70739891 is about 8410.7009814878. The cubic root of 70739891 is about 413.5754923486.

The spelling of 70739891 in words is "seventy million, seven hundred thirty-nine thousand, eight hundred ninety-one".