83998457 has 4 divisors (see below), whose sum is σ = 84814080. Its totient is φ = 83182836.

The previous prime is 83998441. The next prime is 83998459. The reversal of 83998457 is 75489938.

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 83998457 - 2⁴ = 83998441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 83998399 and 83998408.

It is not an unprimeable number, because it can be changed into a prime (83998459) 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, 407657 + ... + 407862.

It is an arithmetic number, because the mean of its divisors is an integer number (21203520).

Almost surely, 2^83998457 is an apocalyptic number.

It is an amenable number.

83998457 is a deficient number, since it is larger than the sum of its proper divisors (815623).

83998457 is a wasteful number, since it uses less digits than its factorization.

83998457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815622.

The product of its digits is 2177280, while the sum is 53.

The square root of 83998457 is about 9165.0672119740. The cubic root of 83998457 is about 437.9492323858.

The spelling of 83998457 in words is "eighty-three million, nine hundred ninety-eight thousand, four hundred fifty-seven".