70312519 has 2 divisors, whose sum is σ = 70312520. Its totient is φ = 70312518.

The previous prime is 70312513. The next prime is 70312523. The reversal of 70312519 is 91521307.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70312519 - 2¹³ = 70304327 is a prime.

It is a super-2 number, since 2×70312519² = 9887700656250722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70312513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35156259 + 35156260.

It is an arithmetic number, because the mean of its divisors is an integer number (35156260).

Almost surely, 2^70312519 is an apocalyptic number.

70312519 is a deficient number, since it is larger than the sum of its proper divisors (1).

70312519 is an equidigital number, since it uses as much as digits as its factorization.

70312519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 70312519 is about 8385.2560485652. The cubic root of 70312519 is about 412.7409432891.

The spelling of 70312519 in words is "seventy million, three hundred twelve thousand, five hundred nineteen".