83451899 has 2 divisors, whose sum is σ = 83451900. Its totient is φ = 83451898.

The previous prime is 83451881. The next prime is 83451919. The reversal of 83451899 is 99815438.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 83451899 - 2¹² = 83447803 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (83453899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41725949 + 41725950.

It is an arithmetic number, because the mean of its divisors is an integer number (41725950).

Almost surely, 2^83451899 is an apocalyptic number.

83451899 is a deficient number, since it is larger than the sum of its proper divisors (1).

83451899 is an equidigital number, since it uses as much as digits as its factorization.

83451899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 47.

The square root of 83451899 is about 9135.2010924774. The cubic root of 83451899 is about 436.9972875010.

The spelling of 83451899 in words is "eighty-three million, four hundred fifty-one thousand, eight hundred ninety-nine".