99494023831 has 16 divisors (see below), whose sum is σ = 102534062400. Its totient is φ = 96508177920.

The previous prime is 99494023813. The next prime is 99494023843. The reversal of 99494023831 is 13832049499.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 99494023831 - 2²¹ = 99491926679 is a prime.

It is a super-2 number, since 2×99494023831² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99494023331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1335441 + ... + 1407973.

It is an arithmetic number, because the mean of its divisors is an integer number (6408378900).

Almost surely, 2^99494023831 is an apocalyptic number.

99494023831 is a deficient number, since it is larger than the sum of its proper divisors (3040038569).

99494023831 is a wasteful number, since it uses less digits than its factorization.

99494023831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72906.

The product of its (nonzero) digits is 1679616, while the sum is 52.

The spelling of 99494023831 in words is "ninety-nine billion, four hundred ninety-four million, twenty-three thousand, eight hundred thirty-one".