79492981 has 8 divisors (see below), whose sum is σ = 80471520. Its totient is φ = 78520752.

The previous prime is 79492967. The next prime is 79492993. The reversal of 79492981 is 18929497.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79492981 - 2¹¹ = 79490933 is a prime.

It is a super-2 number, since 2×79492981² = 12638268056532722, 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 (79492921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26790 + ... + 29608.

It is an arithmetic number, because the mean of its divisors is an integer number (10058940).

Almost surely, 2^79492981 is an apocalyptic number.

It is an amenable number.

79492981 is a deficient number, since it is larger than the sum of its proper divisors (978539).

79492981 is a wasteful number, since it uses less digits than its factorization.

79492981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3155.

The product of its digits is 326592, while the sum is 49.

The square root of 79492981 is about 8915.8836354004. The cubic root of 79492981 is about 429.9747253938.

The spelling of 79492981 in words is "seventy-nine million, four hundred ninety-two thousand, nine hundred eighty-one".