1957078409 has 16 divisors (see below), whose sum is σ = 2303306880. Its totient is φ = 1639388160.

The previous prime is 1957078399. The next prime is 1957078447. The reversal of 1957078409 is 9048707591.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1957078409 is a prime.

It is a super-3 number, since 3×1957078409³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1957074409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70652 + ... + 94370.

It is an arithmetic number, because the mean of its divisors is an integer number (143956680).

Almost surely, 2^1957078409 is an apocalyptic number.

It is an amenable number.

1957078409 is a deficient number, since it is larger than the sum of its proper divisors (346228471).

1957078409 is a wasteful number, since it uses less digits than its factorization.

1957078409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24320.

The product of its (nonzero) digits is 635040, while the sum is 50.

The square root of 1957078409 is about 44238.8789301899. The cubic root of 1957078409 is about 1250.8428255084.

It can be divided in two parts, 19570 and 78409, that added together give a palindrome (97979).

The spelling of 1957078409 in words is "one billion, nine hundred fifty-seven million, seventy-eight thousand, four hundred nine".