83949890 has 16 divisors (see below), whose sum is σ = 152039808. Its totient is φ = 33373296.

The previous prime is 83949883. The next prime is 83949913. The reversal of 83949890 is 9894938.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24122 + ... + 27381.

It is an arithmetic number, because the mean of its divisors is an integer number (9502488).

Almost surely, 2^83949890 is an apocalyptic number.

83949890 is a deficient number, since it is larger than the sum of its proper divisors (68089918).

83949890 is a wasteful number, since it uses less digits than its factorization.

83949890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51673.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 83949890 is about 9162.4172574709. The cubic root of 83949890 is about 437.8648102755.

The spelling of 83949890 in words is "eighty-three million, nine hundred forty-nine thousand, eight hundred ninety".