80869517 has 4 divisors (see below), whose sum is σ = 80927616. Its totient is φ = 80811420.

The previous prime is 80869511. The next prime is 80869543. The reversal of 80869517 is 71596808.

It is a happy number.

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 80869517 - 2⁴ = 80869501 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 (80869511) 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, 26909 + ... + 29762.

It is an arithmetic number, because the mean of its divisors is an integer number (20231904).

Almost surely, 2^80869517 is an apocalyptic number.

It is an amenable number.

80869517 is a deficient number, since it is larger than the sum of its proper divisors (58099).

80869517 is a wasteful number, since it uses less digits than its factorization.

80869517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58098.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 80869517 is about 8992.7480227125. The cubic root of 80869517 is about 432.4424140644.

The spelling of 80869517 in words is "eighty million, eight hundred sixty-nine thousand, five hundred seventeen".