99919926 has 16 divisors (see below), whose sum is σ = 222044400. Its totient is φ = 33306624.

The previous prime is 99919921. The next prime is 99919949. The reversal of 99919926 is 62991999.

It is a happy number.

It is a super-2 number, since 2×99919926² = 19967983223690952, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 1850369 = 99919926 / (9 + 9 + 9 + 1 + 9 + 9 + 2 + 6).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99919921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 925131 + ... + 925238.

It is an arithmetic number, because the mean of its divisors is an integer number (13877775).

Almost surely, 2^99919926 is an apocalyptic number.

99919926 is an abundant number, since it is smaller than the sum of its proper divisors (122124474).

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

99919926 is a wasteful number, since it uses less digits than its factorization.

99919926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850380 (or 1850374 counting only the distinct ones).

The product of its digits is 708588, while the sum is 54.

The square root of 99919926 is about 9995.9954981983. The cubic root of 99919926 is about 464.0349600839.

The spelling of 99919926 in words is "ninety-nine million, nine hundred nineteen thousand, nine hundred twenty-six".