291861903013 has 2 divisors, whose sum is σ = 291861903014. Its totient is φ = 291861903012.

The previous prime is 291861902999. The next prime is 291861903049. The reversal of 291861903013 is 310309168192.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157801206564 + 134060696449 = 397242^2 + 366143^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-291861903013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (291861904013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145930951506 + 145930951507.

It is an arithmetic number, because the mean of its divisors is an integer number (145930951507).

Almost surely, 2^291861903013 is an apocalyptic number.

It is an amenable number.

291861903013 is a deficient number, since it is larger than the sum of its proper divisors (1).

291861903013 is an equidigital number, since it uses as much as digits as its factorization.

291861903013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 43.

The spelling of 291861903013 in words is "two hundred ninety-one billion, eight hundred sixty-one million, nine hundred three thousand, thirteen".