80893991 has 8 divisors (see below), whose sum is σ = 83451504. Its totient is φ = 78376320.

The previous prime is 80893961. The next prime is 80893993. The reversal of 80893991 is 19939808.

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 80893991 - 2¹⁰ = 80892967 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 (80893993) 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, 5810 + ... + 13983.

It is an arithmetic number, because the mean of its divisors is an integer number (10431438).

Almost surely, 2^80893991 is an apocalyptic number.

80893991 is a deficient number, since it is larger than the sum of its proper divisors (2557513).

80893991 is a wasteful number, since it uses less digits than its factorization.

80893991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19921.

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 80893991 is about 8994.1086829102. The cubic root of 80893991 is about 432.4860338301.

The spelling of 80893991 in words is "eighty million, eight hundred ninety-three thousand, nine hundred ninety-one".