79481431 has 4 divisors (see below), whose sum is σ = 82222200. Its totient is φ = 76740664.

The previous prime is 79481429. The next prime is 79481461. The reversal of 79481431 is 13418497.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13418497 = 653 ⋅20549.

It is a cyclic number.

It is not a de Polignac number, because 79481431 - 2¹ = 79481429 is a prime.

It is a super-2 number, since 2×79481431² = 12634595747615522, 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 (79481461) 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, 1370341 + ... + 1370398.

It is an arithmetic number, because the mean of its divisors is an integer number (20555550).

Almost surely, 2^79481431 is an apocalyptic number.

79481431 is a deficient number, since it is larger than the sum of its proper divisors (2740769).

79481431 is a wasteful number, since it uses less digits than its factorization.

79481431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2740768.

The product of its digits is 24192, while the sum is 37.

The square root of 79481431 is about 8915.2358914389. The cubic root of 79481431 is about 429.9538998712.

The spelling of 79481431 in words is "seventy-nine million, four hundred eighty-one thousand, four hundred thirty-one".