83919797 has 8 divisors (see below), whose sum is σ = 90953016. Its totient is φ = 76969152.

The previous prime is 83919793. The next prime is 83919809. The reversal of 83919797 is 79791938.

It can be written as a sum of positive squares in 4 ways, for example, as 2937796 + 80982001 = 1714^2 + 8999^2 .

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

It is not a de Polignac number, because 83919797 - 2² = 83919793 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 (83919793) 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, 18518 + ... + 22599.

It is an arithmetic number, because the mean of its divisors is an integer number (11369127).

Almost surely, 2^83919797 is an apocalyptic number.

It is an amenable number.

83919797 is a deficient number, since it is larger than the sum of its proper divisors (7033219).

83919797 is a wasteful number, since it uses less digits than its factorization.

83919797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41287.

The product of its digits is 857304, while the sum is 53.

The square root of 83919797 is about 9160.7749126370. The cubic root of 83919797 is about 437.8124844555.

The spelling of 83919797 in words is "eighty-three million, nine hundred nineteen thousand, seven hundred ninety-seven".