1077443857 has 4 divisors (see below), whose sum is σ = 1231364416. Its totient is φ = 923523300.

The previous prime is 1077443831. The next prime is 1077443869. The reversal of 1077443857 is 7583447701.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7583447701 = 107 ⋅70873343.

It is not a de Polignac number, because 1077443857 - 2⁷ = 1077443729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1077453857) 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, 76960269 + ... + 76960282.

It is an arithmetic number, because the mean of its divisors is an integer number (307841104).

Almost surely, 2^1077443857 is an apocalyptic number.

It is an amenable number.

1077443857 is a deficient number, since it is larger than the sum of its proper divisors (153920559).

1077443857 is an equidigital number, since it uses as much as digits as its factorization.

1077443857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153920558.

The product of its (nonzero) digits is 658560, while the sum is 46.

The square root of 1077443857 is about 32824.4399342929. The cubic root of 1077443857 is about 1025.1754946784.

The spelling of 1077443857 in words is "one billion, seventy-seven million, four hundred forty-three thousand, eight hundred fifty-seven".