70319791 has 2 divisors, whose sum is σ = 70319792. Its totient is φ = 70319790.

The previous prime is 70319731. The next prime is 70319827. The reversal of 70319791 is 19791307.

It is a strong prime.

It is an emirp because it is prime and its reverse (19791307) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70319791 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70319791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70319731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35159895 + 35159896.

It is an arithmetic number, because the mean of its divisors is an integer number (35159896).

Almost surely, 2^70319791 is an apocalyptic number.

70319791 is a deficient number, since it is larger than the sum of its proper divisors (1).

70319791 is an equidigital number, since it uses as much as digits as its factorization.

70319791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11907, while the sum is 37.

The square root of 70319791 is about 8385.6896555978. The cubic root of 70319791 is about 412.7551719012.

The spelling of 70319791 in words is "seventy million, three hundred nineteen thousand, seven hundred ninety-one".