79981501 has 8 divisors (see below), whose sum is σ = 81398520. Its totient is φ = 78573312.

The previous prime is 79981463. The next prime is 79981567. The reversal of 79981501 is 10518997.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 308025 + 79673476 = 555^2 + 8926^2 .

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 79981501 - 2¹¹ = 79979453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79981001) 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, 17601 + ... + 21673.

It is an arithmetic number, because the mean of its divisors is an integer number (10174815).

Almost surely, 2^79981501 is an apocalyptic number.

It is an amenable number.

79981501 is a deficient number, since it is larger than the sum of its proper divisors (1417019).

79981501 is a wasteful number, since it uses less digits than its factorization.

79981501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4415.

The product of its (nonzero) digits is 22680, while the sum is 40.

The square root of 79981501 is about 8943.2377246722. The cubic root of 79981501 is about 430.8537230400.

The spelling of 79981501 in words is "seventy-nine million, nine hundred eighty-one thousand, five hundred one".