1161972537 has 8 divisors (see below), whose sum is σ = 1690141920. Its totient is φ = 704225760.

The previous prime is 1161972523. The next prime is 1161972541. The reversal of 1161972537 is 7352791611.

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

It is not a de Polignac number, because 1161972537 - 2⁸ = 1161972281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1161972517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17605612 + ... + 17605677.

It is an arithmetic number, because the mean of its divisors is an integer number (211267740).

Almost surely, 2^1161972537 is an apocalyptic number.

It is an amenable number.

1161972537 is a deficient number, since it is larger than the sum of its proper divisors (528169383).

1161972537 is a wasteful number, since it uses less digits than its factorization.

1161972537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35211303.

The product of its digits is 79380, while the sum is 42.

The square root of 1161972537 is about 34087.7182721285. The cubic root of 1161972537 is about 1051.3128059984.

The spelling of 1161972537 in words is "one billion, one hundred sixty-one million, nine hundred seventy-two thousand, five hundred thirty-seven".