381250013 has 2 divisors, whose sum is σ = 381250014. Its totient is φ = 381250012.

The previous prime is 381249977. The next prime is 381250027. The reversal of 381250013 is 310052183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 282307204 + 98942809 = 16802^2 + 9947^2 .

It is a cyclic number.

It is not a de Polignac number, because 381250013 - 2⁶ = 381249949 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381250913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190625006 + 190625007.

It is an arithmetic number, because the mean of its divisors is an integer number (190625007).

Almost surely, 2^381250013 is an apocalyptic number.

It is an amenable number.

381250013 is a deficient number, since it is larger than the sum of its proper divisors (1).

381250013 is an equidigital number, since it uses as much as digits as its factorization.

381250013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 381250013 is about 19525.6245226625. The cubic root of 381250013 is about 725.1089890846.

The spelling of 381250013 in words is "three hundred eighty-one million, two hundred fifty thousand, thirteen".