972021353 has 4 divisors (see below), whose sum is σ = 985336788. Its totient is φ = 958705920.

The previous prime is 972021313. The next prime is 972021371. The reversal of 972021353 is 353120279.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 353120279 = 3911 ⋅90289.

It can be written as a sum of positive squares in 2 ways, for example, as 690217984 + 281803369 = 26272^2 + 16787^2 .

It is a cyclic number.

It is not a de Polignac number, because 972021353 - 2⁶ = 972021289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (972021313) 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, 6657608 + ... + 6657753.

It is an arithmetic number, because the mean of its divisors is an integer number (246334197).

Almost surely, 2^972021353 is an apocalyptic number.

It is an amenable number.

972021353 is a deficient number, since it is larger than the sum of its proper divisors (13315435).

972021353 is a wasteful number, since it uses less digits than its factorization.

972021353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13315434.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 972021353 is about 31177.2569832562. The cubic root of 972021353 is about 990.5854283244.

The spelling of 972021353 in words is "nine hundred seventy-two million, twenty-one thousand, three hundred fifty-three".