381365437 has 4 divisors (see below), whose sum is σ = 403798716. Its totient is φ = 358932160.

The previous prime is 381365429. The next prime is 381365443. The reversal of 381365437 is 734563183.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 174609796 + 206755641 = 13214^2 + 14379^2 .

It is a cyclic number.

It is not a de Polignac number, because 381365437 - 2³ = 381365429 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 381365437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381369437) 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, 11216614 + ... + 11216647.

It is an arithmetic number, because the mean of its divisors is an integer number (100949679).

Almost surely, 2^381365437 is an apocalyptic number.

It is an amenable number.

381365437 is a deficient number, since it is larger than the sum of its proper divisors (22433279).

381365437 is a wasteful number, since it uses less digits than its factorization.

381365437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22433278.

The product of its digits is 181440, while the sum is 40.

The square root of 381365437 is about 19528.5800047008. The cubic root of 381365437 is about 725.1821576374.

The spelling of 381365437 in words is "three hundred eighty-one million, three hundred sixty-five thousand, four hundred thirty-seven".