99461391 has 8 divisors (see below), whose sum is σ = 133244544. Its totient is φ = 65992920.

The previous prime is 99461389. The next prime is 99461413. The reversal of 99461391 is 19316499.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99461391 - 2¹ = 99461389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99461321) 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, 77931 + ... + 79196.

It is an arithmetic number, because the mean of its divisors is an integer number (16655568).

Almost surely, 2^99461391 is an apocalyptic number.

99461391 is the 6308-th centered pentagonal number.

99461391 is a deficient number, since it is larger than the sum of its proper divisors (33783153).

99461391 is a wasteful number, since it uses less digits than its factorization.

99461391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157341.

The product of its digits is 52488, while the sum is 42.

The square root of 99461391 is about 9973.0331895567. The cubic root of 99461391 is about 463.3240488912.

The spelling of 99461391 in words is "ninety-nine million, four hundred sixty-one thousand, three hundred ninety-one".