2970191857 has 2 divisors, whose sum is σ = 2970191858. Its totient is φ = 2970191856.

The previous prime is 2970191831. The next prime is 2970191863. The reversal of 2970191857 is 7581910792.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2816531041 + 153660816 = 53071^2 + 12396^2 .

It is a cyclic number.

It is not a de Polignac number, because 2970191857 - 2⁷ = 2970191729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2970191857.

It is not a weakly prime, because it can be changed into another prime (2970191867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1485095928 + 1485095929.

It is an arithmetic number, because the mean of its divisors is an integer number (1485095929).

Almost surely, 2^2970191857 is an apocalyptic number.

It is an amenable number.

2970191857 is a deficient number, since it is larger than the sum of its proper divisors (1).

2970191857 is an equidigital number, since it uses as much as digits as its factorization.

2970191857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317520, while the sum is 49.

The square root of 2970191857 is about 54499.4665753712. The cubic root of 2970191857 is about 1437.4569082180.

The spelling of 2970191857 in words is "two billion, nine hundred seventy million, one hundred ninety-one thousand, eight hundred fifty-seven".