31194669899 has 4 divisors (see below), whose sum is σ = 31214528040. Its totient is φ = 31174811760.

The previous prime is 31194669853. The next prime is 31194669941. The reversal of 31194669899 is 99896649113.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99896649113 = 15901 ⋅6282413.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31194669899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31194629899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9926714 + ... + 9929855.

It is an arithmetic number, because the mean of its divisors is an integer number (7803632010).

Almost surely, 2^31194669899 is an apocalyptic number.

31194669899 is a deficient number, since it is larger than the sum of its proper divisors (19858141).

31194669899 is a wasteful number, since it uses less digits than its factorization.

31194669899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19858140.

The product of its digits is 22674816, while the sum is 65.

The spelling of 31194669899 in words is "thirty-one billion, one hundred ninety-four million, six hundred sixty-nine thousand, eight hundred ninety-nine".