291492213853 has 2 divisors, whose sum is σ = 291492213854. Its totient is φ = 291492213852.

The previous prime is 291492213839. The next prime is 291492213907. The reversal of 291492213853 is 358312294192.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206649340569 + 84842873284 = 454587^2 + 291278^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-291492213853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 291492213797 and 291492213806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (291492213833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145746106926 + 145746106927.

It is an arithmetic number, because the mean of its divisors is an integer number (145746106927).

Almost surely, 2^291492213853 is an apocalyptic number.

It is an amenable number.

291492213853 is a deficient number, since it is larger than the sum of its proper divisors (1).

291492213853 is an equidigital number, since it uses as much as digits as its factorization.

291492213853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 49.

The spelling of 291492213853 in words is "two hundred ninety-one billion, four hundred ninety-two million, two hundred thirteen thousand, eight hundred fifty-three".