83991950 has 24 divisors (see below), whose sum is σ = 178543632. Its totient is φ = 28797120.

The previous prime is 83991949. The next prime is 83991959. The reversal of 83991950 is 5919938.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83991959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119639 + ... + 120338.

It is an arithmetic number, because the mean of its divisors is an integer number (7439318).

Almost surely, 2^83991950 is an apocalyptic number.

83991950 is an abundant number, since it is smaller than the sum of its proper divisors (94551682).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

83991950 is a wasteful number, since it uses less digits than its factorization.

83991950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239996 (or 239991 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 83991950 is about 9164.7122158855. The cubic root of 83991950 is about 437.9379234113.

The spelling of 83991950 in words is "eighty-three million, nine hundred ninety-one thousand, nine hundred fifty".