899999999993491 has 8 divisors (see below), whose sum is σ = 950890236742800. Its totient is φ = 849461944813920.

The previous prime is 899999999993477. The next prime is 899999999993503. The reversal of 899999999993491 is 194399999999998.

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

It is a cyclic number.

It is not a de Polignac number, because 899999999993491 - 2²¹ = 899999997896339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (899999999993411) 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, 88045387180 + ... + 88045397401.

It is an arithmetic number, because the mean of its divisors is an integer number (118861279592850).

Almost surely, 2^{899999999993491} is an apocalyptic number.

899999999993491 is a deficient number, since it is larger than the sum of its proper divisors (50890236749309).

899999999993491 is a wasteful number, since it uses less digits than its factorization.

899999999993491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176090784869.

The product of its digits is 3012581722464, while the sum is 115.

The spelling of 899999999993491 in words is "eight hundred ninety-nine trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-three thousand, four hundred ninety-one".