381064631 has 2 divisors, whose sum is σ = 381064632. Its totient is φ = 381064630.

The previous prime is 381064603. The next prime is 381064661. The reversal of 381064631 is 136460183.

It is a weak prime.

It is an emirp because it is prime and its reverse (136460183) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381064631 is a prime.

It is a super-2 number, since 2×381064631² = 290420505998332322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381064601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190532315 + 190532316.

It is an arithmetic number, because the mean of its divisors is an integer number (190532316).

Almost surely, 2^381064631 is an apocalyptic number.

381064631 is a deficient number, since it is larger than the sum of its proper divisors (1).

381064631 is an equidigital number, since it uses as much as digits as its factorization.

381064631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 381064631 is about 19520.8767989555. The cubic root of 381064631 is about 724.9914424674.

The spelling of 381064631 in words is "three hundred eighty-one million, sixty-four thousand, six hundred thirty-one".