468640993 has 2 divisors, whose sum is σ = 468640994. Its totient is φ = 468640992.

The previous prime is 468640987. The next prime is 468641011. The reversal of 468640993 is 399046864.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 277289104 + 191351889 = 16652^2 + 13833^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-468640993 is a prime.

It is not a weakly prime, because it can be changed into another prime (468640903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 234320496 + 234320497.

It is an arithmetic number, because the mean of its divisors is an integer number (234320497).

Almost surely, 2^468640993 is an apocalyptic number.

It is an amenable number.

468640993 is a deficient number, since it is larger than the sum of its proper divisors (1).

468640993 is an equidigital number, since it uses as much as digits as its factorization.

468640993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1119744, while the sum is 49.

The square root of 468640993 is about 21648.1175394074. The cubic root of 468640993 is about 776.7479066924.

The spelling of 468640993 in words is "four hundred sixty-eight million, six hundred forty thousand, nine hundred ninety-three".