1957478827 has 4 divisors (see below), whose sum is σ = 1982257120. Its totient is φ = 1932700536.

The previous prime is 1957478807. The next prime is 1957478833. The reversal of 1957478827 is 7288747591.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1957478827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1957478807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12389028 + ... + 12389185.

It is an arithmetic number, because the mean of its divisors is an integer number (495564280).

Almost surely, 2^1957478827 is an apocalyptic number.

1957478827 is a deficient number, since it is larger than the sum of its proper divisors (24778293).

1957478827 is an equidigital number, since it uses as much as digits as its factorization.

1957478827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24778292.

The product of its digits is 7902720, while the sum is 58.

The square root of 1957478827 is about 44243.4043333015. The cubic root of 1957478827 is about 1250.9281271201.

The spelling of 1957478827 in words is "one billion, nine hundred fifty-seven million, four hundred seventy-eight thousand, eight hundred twenty-seven".