2173956457 has 2 divisors, whose sum is σ = 2173956458. Its totient is φ = 2173956456.

The previous prime is 2173956427. The next prime is 2173956469. The reversal of 2173956457 is 7546593712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1692417321 + 481539136 = 41139^2 + 21944^2 .

It is a cyclic number.

It is not a de Polignac number, because 2173956457 - 2⁷ = 2173956329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2173956457.

It is not a weakly prime, because it can be changed into another prime (2173956427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086978228 + 1086978229.

It is an arithmetic number, because the mean of its divisors is an integer number (1086978229).

Almost surely, 2^2173956457 is an apocalyptic number.

It is an amenable number.

2173956457 is a deficient number, since it is larger than the sum of its proper divisors (1).

2173956457 is an equidigital number, since it uses as much as digits as its factorization.

2173956457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1587600, while the sum is 49.

The square root of 2173956457 is about 46625.7059678457. The cubic root of 2173956457 is about 1295.4389386768.

The spelling of 2173956457 in words is "two billion, one hundred seventy-three million, nine hundred fifty-six thousand, four hundred fifty-seven".