972691 has 4 divisors (see below), whose sum is σ = 974752. Its totient is φ = 970632.

The previous prime is 972683. The next prime is 972701. The reversal of 972691 is 196279.

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 972691 - 2³ = 972683 is a prime.

It is a super-2 number, since 2×972691² = 1892255562962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (972611) 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 3 ways as a sum of consecutive naturals, for example, 70 + ... + 1396.

It is an arithmetic number, because the mean of its divisors is an integer number (243688).

2⁹⁷²⁶⁹¹ is an apocalyptic number.

972691 is a deficient number, since it is larger than the sum of its proper divisors (2061).

972691 is a wasteful number, since it uses less digits than its factorization.

972691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2060.

The product of its digits is 6804, while the sum is 34.

The square root of 972691 is about 986.2509822555. The cubic root of 972691 is about 99.0812854840.

The spelling of 972691 in words is "nine hundred seventy-two thousand, six hundred ninety-one".