972756641 has 4 divisors (see below), whose sum is σ = 1015050432. Its totient is φ = 930462852.

The previous prime is 972756637. The next prime is 972756649. The reversal of 972756641 is 146657279.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 146657279 = 389 ⋅377011.

It is a cyclic number.

It is not a de Polignac number, because 972756641 - 2² = 972756637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (972756649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21146861 + ... + 21146906.

It is an arithmetic number, because the mean of its divisors is an integer number (253762608).

Almost surely, 2^972756641 is an apocalyptic number.

It is an amenable number.

972756641 is a deficient number, since it is larger than the sum of its proper divisors (42293791).

972756641 is a wasteful number, since it uses less digits than its factorization.

972756641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42293790.

The product of its digits is 635040, while the sum is 47.

The square root of 972756641 is about 31189.0468113407. The cubic root of 972756641 is about 990.8351423165.

The spelling of 972756641 in words is "nine hundred seventy-two million, seven hundred fifty-six thousand, six hundred forty-one".