992951381 has 4 divisors (see below), whose sum is σ = 1045212000. Its totient is φ = 940690764.

The previous prime is 992951363. The next prime is 992951411. The reversal of 992951381 is 183159299.

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.

It is a cyclic number.

It is not a de Polignac number, because 992951381 - 2¹⁸ = 992689237 is a prime.

It is a super-2 number, since 2×992951381² = 1971904890059614322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (992951321) 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, 26130281 + ... + 26130318.

It is an arithmetic number, because the mean of its divisors is an integer number (261303000).

Almost surely, 2^992951381 is an apocalyptic number.

It is an amenable number.

992951381 is a deficient number, since it is larger than the sum of its proper divisors (52260619).

992951381 is a wasteful number, since it uses less digits than its factorization.

992951381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52260618.

The product of its digits is 174960, while the sum is 47.

The square root of 992951381 is about 31511.1310650697. The cubic root of 992951381 is about 997.6449182775.

The spelling of 992951381 in words is "nine hundred ninety-two million, nine hundred fifty-one thousand, three hundred eighty-one".