972220069 has 8 divisors (see below), whose sum is σ = 986823000. Its totient is φ = 957699072.

The previous prime is 972220043. The next prime is 972220087. The reversal of 972220069 is 960022279.

It can be written as a sum of positive squares in 4 ways, for example, as 35247969 + 936972100 = 5937^2 + 30610^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-972220069 is a prime.

It is a super-2 number, since 2×972220069² = 1890423725132729522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (972220169) 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, 3637 + ... + 44245.

It is an arithmetic number, because the mean of its divisors is an integer number (123352875).

Almost surely, 2^972220069 is an apocalyptic number.

It is an amenable number.

972220069 is a deficient number, since it is larger than the sum of its proper divisors (14602931).

972220069 is a wasteful number, since it uses less digits than its factorization.

972220069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40967.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 972220069 is about 31180.4436947263. The cubic root of 972220069 is about 990.6529274456.

It can be divided in two parts, 9722 and 20069, that added together give a cube (29791 = 31³).

The spelling of 972220069 in words is "nine hundred seventy-two million, two hundred twenty thousand, sixty-nine".