9972440739 has 32 divisors (see below), whose sum is σ = 14984087040. Its totient is φ = 6554329056.

The previous prime is 9972440711. The next prime is 9972440741. The reversal of 9972440739 is 9370442799.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-9972440739 is a prime.

It is a super-2 number, since 2×9972440739² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9972440749) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 623389 + ... + 639185.

It is an arithmetic number, because the mean of its divisors is an integer number (468252720).

Almost surely, 2^9972440739 is an apocalyptic number.

9972440739 is a deficient number, since it is larger than the sum of its proper divisors (5011646301).

9972440739 is a wasteful number, since it uses less digits than its factorization.

9972440739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16136 (or 16130 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 54.

The square root of 9972440739 is about 99862.1086248433. The cubic root of 9972440739 is about 2152.4537148444.

The spelling of 9972440739 in words is "nine billion, nine hundred seventy-two million, four hundred forty thousand, seven hundred thirty-nine".