1170971651 has 4 divisors (see below), whose sum is σ = 1171790232. Its totient is φ = 1170153072.

The previous prime is 1170971621. The next prime is 1170971693. The reversal of 1170971651 is 1561790711.

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 1170971651 - 2³⁰ = 97229827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1170971621) 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, 407141 + ... + 410006.

It is an arithmetic number, because the mean of its divisors is an integer number (292947558).

Almost surely, 2^1170971651 is an apocalyptic number.

1170971651 is a deficient number, since it is larger than the sum of its proper divisors (818581).

1170971651 is an equidigital number, since it uses as much as digits as its factorization.

1170971651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818580.

The product of its (nonzero) digits is 13230, while the sum is 38.

The square root of 1170971651 is about 34219.4630437124. The cubic root of 1170971651 is about 1054.0198592132.

The spelling of 1170971651 in words is "one billion, one hundred seventy million, nine hundred seventy-one thousand, six hundred fifty-one".