99890534 has 4 divisors (see below), whose sum is σ = 149835804. Its totient is φ = 49945266.

The previous prime is 99890509. The next prime is 99890537. The reversal of 99890534 is 43509899.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43509899 = 241 ⋅180539.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99890537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24972632 + ... + 24972635.

It is an arithmetic number, because the mean of its divisors is an integer number (37458951).

Almost surely, 2^99890534 is an apocalyptic number.

99890534 is a deficient number, since it is larger than the sum of its proper divisors (49945270).

99890534 is a wasteful number, since it uses less digits than its factorization.

99890534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49945269.

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 99890534 is about 9994.5252013290. The cubic root of 99890534 is about 463.9894561367.

The spelling of 99890534 in words is "ninety-nine million, eight hundred ninety thousand, five hundred thirty-four".