972290399 has 4 divisors (see below), whose sum is σ = 986802264. Its totient is φ = 957778536.

The previous prime is 972290393. The next prime is 972290413. The reversal of 972290399 is 993092279.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993092279 = 11399 ⋅87121.

It is a cyclic number.

It is not a de Polignac number, because 972290399 - 2⁴ = 972290383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (972290393) 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, 7255832 + ... + 7255965.

It is an arithmetic number, because the mean of its divisors is an integer number (246700566).

Almost surely, 2^972290399 is an apocalyptic number.

972290399 is a deficient number, since it is larger than the sum of its proper divisors (14511865).

972290399 is a wasteful number, since it uses less digits than its factorization.

972290399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14511864.

The product of its (nonzero) digits is 551124, while the sum is 50.

The square root of 972290399 is about 31181.5714645686. The cubic root of 972290399 is about 990.6768146781.

The spelling of 972290399 in words is "nine hundred seventy-two million, two hundred ninety thousand, three hundred ninety-nine".