99491427 has 24 divisors (see below), whose sum is σ = 166938720. Its totient is φ = 55918080.

The previous prime is 99491423. The next prime is 99491437. The reversal of 99491427 is 72419499.

It is a happy number.

It is not a de Polignac number, because 99491427 - 2² = 99491423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99491423) 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, 9102 + ... + 16787.

It is an arithmetic number, because the mean of its divisors is an integer number (6955780).

Almost surely, 2^99491427 is an apocalyptic number.

99491427 is a deficient number, since it is larger than the sum of its proper divisors (67447293).

99491427 is a wasteful number, since it uses less digits than its factorization.

99491427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25963 (or 25960 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 99491427 is about 9974.5389367128. The cubic root of 99491427 is about 463.3706834040.

The spelling of 99491427 in words is "ninety-nine million, four hundred ninety-one thousand, four hundred twenty-seven".