1047166557 has 4 divisors (see below), whose sum is σ = 1396222080. Its totient is φ = 698111036.

The previous prime is 1047166543. The next prime is 1047166579. The reversal of 1047166557 is 7556617401.

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.

It is a cyclic number.

It is not a de Polignac number, because 1047166557 - 2⁸ = 1047166301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1047166957) 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, 174527757 + ... + 174527762.

It is an arithmetic number, because the mean of its divisors is an integer number (349055520).

Almost surely, 2^1047166557 is an apocalyptic number.

It is an amenable number.

1047166557 is a deficient number, since it is larger than the sum of its proper divisors (349055523).

1047166557 is an equidigital number, since it uses as much as digits as its factorization.

1047166557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349055522.

The product of its (nonzero) digits is 176400, while the sum is 42.

The square root of 1047166557 is about 32359.9529820425. The cubic root of 1047166557 is about 1015.4812788718.

It can be divided in two parts, 10471 and 66557, that added together give a triangular number (77028 = T₃₉₂).

The spelling of 1047166557 in words is "one billion, forty-seven million, one hundred sixty-six thousand, five hundred fifty-seven".