381295657 has 4 divisors (see below), whose sum is σ = 381500676. Its totient is φ = 381090640.

The previous prime is 381295643. The next prime is 381295699. The reversal of 381295657 is 756592183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 756592183 = 8527 ⋅88729.

It can be written as a sum of positive squares in 2 ways, for example, as 301925376 + 79370281 = 17376^2 + 8909^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381295657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381295157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99694 + ... + 103447.

It is an arithmetic number, because the mean of its divisors is an integer number (95375169).

Almost surely, 2^381295657 is an apocalyptic number.

It is an amenable number.

381295657 is a deficient number, since it is larger than the sum of its proper divisors (205019).

381295657 is a wasteful number, since it uses less digits than its factorization.

381295657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205018.

The product of its digits is 453600, while the sum is 46.

The square root of 381295657 is about 19526.7933107308. The cubic root of 381295657 is about 725.1379250870.

The spelling of 381295657 in words is "three hundred eighty-one million, two hundred ninety-five thousand, six hundred fifty-seven".