1165976971 has 4 divisors (see below), whose sum is σ = 1227344200. Its totient is φ = 1104609744.

The previous prime is 1165976963. The next prime is 1165976993. The reversal of 1165976971 is 1796795611.

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

It is a cyclic number.

It is not a de Polignac number, because 1165976971 - 2³ = 1165976963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1165976921) 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, 30683586 + ... + 30683623.

It is an arithmetic number, because the mean of its divisors is an integer number (306836050).

Almost surely, 2^1165976971 is an apocalyptic number.

1165976971 is a deficient number, since it is larger than the sum of its proper divisors (61367229).

1165976971 is an equidigital number, since it uses as much as digits as its factorization.

1165976971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61367228.

The product of its digits is 714420, while the sum is 52.

The square root of 1165976971 is about 34146.4049498626. The cubic root of 1165976971 is about 1052.5191127250.

The spelling of 1165976971 in words is "one billion, one hundred sixty-five million, nine hundred seventy-six thousand, nine hundred seventy-one".