1161057887 has 8 divisors (see below), whose sum is σ = 1267070592. Its totient is φ = 1055122200.

The previous prime is 1161057883. The next prime is 1161057907. The reversal of 1161057887 is 7887501611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1161057887 - 2² = 1161057883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161057881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14918 + ... + 50444.

It is an arithmetic number, because the mean of its divisors is an integer number (158383824).

Almost surely, 2^1161057887 is an apocalyptic number.

1161057887 is a deficient number, since it is larger than the sum of its proper divisors (106012705).

1161057887 is a wasteful number, since it uses less digits than its factorization.

1161057887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38509.

The product of its (nonzero) digits is 94080, while the sum is 44.

The square root of 1161057887 is about 34074.2995085739. The cubic root of 1161057887 is about 1051.0368856296.

The spelling of 1161057887 in words is "one billion, one hundred sixty-one million, fifty-seven thousand, eight hundred eighty-seven".