70312919 has 2 divisors, whose sum is σ = 70312920. Its totient is φ = 70312918.

The previous prime is 70312883. The next prime is 70312973. The reversal of 70312919 is 91921307.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70312919 is a prime.

It is a super-2 number, since 2×70312919² = 9887813156601122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70312519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35156459 + 35156460.

It is an arithmetic number, because the mean of its divisors is an integer number (35156460).

Almost surely, 2^70312919 is an apocalyptic number.

70312919 is a deficient number, since it is larger than the sum of its proper divisors (1).

70312919 is an equidigital number, since it uses as much as digits as its factorization.

70312919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 70312919 is about 8385.2798999199. The cubic root of 70312919 is about 412.7417259665.

The spelling of 70312919 in words is "seventy million, three hundred twelve thousand, nine hundred nineteen".