972191027 has 4 divisors (see below), whose sum is σ = 974899440. Its totient is φ = 969482616.

The previous prime is 972191009. The next prime is 972191047. The reversal of 972191027 is 720191279.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 720191279 = 269 ⋅2677291.

It is a cyclic number.

It is not a de Polignac number, because 972191027 - 2¹⁶ = 972125491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (972191047) 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, 1353668 + ... + 1354385.

It is an arithmetic number, because the mean of its divisors is an integer number (243724860).

Almost surely, 2^972191027 is an apocalyptic number.

972191027 is a deficient number, since it is larger than the sum of its proper divisors (2708413).

972191027 is a wasteful number, since it uses less digits than its factorization.

972191027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2708412.

The product of its (nonzero) digits is 15876, while the sum is 38.

The square root of 972191027 is about 31179.9779826734. The cubic root of 972191027 is about 990.6430631396.

The spelling of 972191027 in words is "nine hundred seventy-two million, one hundred ninety-one thousand, twenty-seven".