31194669853 has 2 divisors, whose sum is σ = 31194669854. Its totient is φ = 31194669852.

The previous prime is 31194669833. The next prime is 31194669941. The reversal of 31194669853 is 35896649113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18641260089 + 12553409764 = 136533^2 + 112042^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31194669853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31194669794 and 31194669803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31194669833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15597334926 + 15597334927.

It is an arithmetic number, because the mean of its divisors is an integer number (15597334927).

Almost surely, 2^31194669853 is an apocalyptic number.

It is an amenable number.

31194669853 is a deficient number, since it is larger than the sum of its proper divisors (1).

31194669853 is an equidigital number, since it uses as much as digits as its factorization.

31194669853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4199040, while the sum is 55.

The spelling of 31194669853 in words is "thirty-one billion, one hundred ninety-four million, six hundred sixty-nine thousand, eight hundred fifty-three".