381021695 has 4 divisors (see below), whose sum is σ = 457226040. Its totient is φ = 304817352.

The previous prime is 381021679. The next prime is 381021721. The reversal of 381021695 is 596120183.

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

It is a cyclic number.

It is not a de Polignac number, because 381021695 - 2⁴ = 381021679 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38102165 + ... + 38102174.

It is an arithmetic number, because the mean of its divisors is an integer number (114306510).

Almost surely, 2^381021695 is an apocalyptic number.

381021695 is a deficient number, since it is larger than the sum of its proper divisors (76204345).

381021695 is an equidigital number, since it uses as much as digits as its factorization.

381021695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76204344.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 381021695 is about 19519.7770222920. Note that the first 3 decimals coincide. The cubic root of 381021695 is about 724.9642122644.

The spelling of 381021695 in words is "three hundred eighty-one million, twenty-one thousand, six hundred ninety-five".