992970981 has 20 divisors (see below), whose sum is σ = 1487413312. Its totient is φ = 660157128.

The previous prime is 992970967. The next prime is 992970983. The reversal of 992970981 is 189079299.

It is not a de Polignac number, because 992970981 - 2¹⁸ = 992708837 is a prime.

It is a super-2 number, since 2×992970981² = 1971982738216204722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (992970983) 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 19 ways as a sum of consecutive naturals, for example, 13026 + ... + 46428.

Almost surely, 2^992970981 is an apocalyptic number.

It is an amenable number.

992970981 is a deficient number, since it is larger than the sum of its proper divisors (494442331).

992970981 is a wasteful number, since it uses less digits than its factorization.

992970981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33782 (or 33773 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 54.

The square root of 992970981 is about 31511.4420647485. The cubic root of 992970981 is about 997.6514824498.

The spelling of 992970981 in words is "nine hundred ninety-two million, nine hundred seventy thousand, nine hundred eighty-one".