612970691 has 2 divisors, whose sum is σ = 612970692. Its totient is φ = 612970690.

The previous prime is 612970583. The next prime is 612970693. The reversal of 612970691 is 196079216.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-612970691 is a prime.

Together with 612970693, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_31966358 and since 612970691 and 31966358 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (612970693) 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, 306485345 + 306485346.

It is an arithmetic number, because the mean of its divisors is an integer number (306485346).

Almost surely, 2^612970691 is an apocalyptic number.

612970691 is a deficient number, since it is larger than the sum of its proper divisors (1).

612970691 is an equidigital number, since it uses as much as digits as its factorization.

612970691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 612970691 is about 24758.2449095246. The cubic root of 612970691 is about 849.4671128171.

The spelling of 612970691 in words is "six hundred twelve million, nine hundred seventy thousand, six hundred ninety-one".