1957458049 has 4 divisors (see below), whose sum is σ = 1962244420. Its totient is φ = 1952671680.

The previous prime is 1957458043. The next prime is 1957458059. The reversal of 1957458049 is 9408547591.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1728480625 + 228977424 = 41575^2 + 15132^2 .

It is a cyclic number.

It is not a de Polignac number, because 1957458049 - 2¹¹ = 1957456001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1957457987 and 1957458005.

It is not an unprimeable number, because it can be changed into a prime (1957458043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2392572 + ... + 2393389.

It is an arithmetic number, because the mean of its divisors is an integer number (490561105).

Almost surely, 2^1957458049 is an apocalyptic number.

It is an amenable number.

1957458049 is a deficient number, since it is larger than the sum of its proper divisors (4786371).

1957458049 is an equidigital number, since it uses as much as digits as its factorization.

1957458049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4786370.

The product of its (nonzero) digits is 1814400, while the sum is 52.

The square root of 1957458049 is about 44243.1695180171. The cubic root of 1957458049 is about 1250.9237010396.

The spelling of 1957458049 in words is "one billion, nine hundred fifty-seven million, four hundred fifty-eight thousand, forty-nine".