99517770 has 48 divisors (see below), whose sum is σ = 282271392. Its totient is φ = 24125280.

The previous prime is 99517751. The next prime is 99517771. The reversal of 99517770 is 7771599.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (99517771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49272 + ... + 51251.

It is an arithmetic number, because the mean of its divisors is an integer number (5880654).

Almost surely, 2^99517770 is an apocalyptic number.

99517770 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

99517770 is an abundant number, since it is smaller than the sum of its proper divisors (182753622).

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

99517770 is a wasteful number, since it uses less digits than its factorization.

99517770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100547 (or 100544 counting only the distinct ones).

The product of its (nonzero) digits is 138915, while the sum is 45.

The square root of 99517770 is about 9975.8593614786. The cubic root of 99517770 is about 463.4115763636.

The spelling of 99517770 in words is "ninety-nine million, five hundred seventeen thousand, seven hundred seventy".