83012991 has 8 divisors (see below), whose sum is σ = 111093504. Its totient is φ = 55137240.

The previous prime is 83012977. The next prime is 83013001. The reversal of 83012991 is 19921038.

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

It is not a de Polignac number, because 83012991 - 2⁵ = 83012959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83013991) 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, 50241 + ... + 51866.

It is an arithmetic number, because the mean of its divisors is an integer number (13886688).

Almost surely, 2^83012991 is an apocalyptic number.

83012991 is a deficient number, since it is larger than the sum of its proper divisors (28080513).

83012991 is a wasteful number, since it uses less digits than its factorization.

83012991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102381.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 83012991 is about 9111.1465249989. The cubic root of 83012991 is about 436.2298240547.

The spelling of 83012991 in words is "eighty-three million, twelve thousand, nine hundred ninety-one".