381022397 has 4 divisors (see below), whose sum is σ = 435454176. Its totient is φ = 326590620.

The previous prime is 381022363. The next prime is 381022417. The reversal of 381022397 is 793220183.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 381022397 - 2¹² = 381018301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381022997) 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, 27215879 + ... + 27215892.

It is an arithmetic number, because the mean of its divisors is an integer number (108863544).

Almost surely, 2^381022397 is an apocalyptic number.

It is an amenable number.

381022397 is a deficient number, since it is larger than the sum of its proper divisors (54431779).

381022397 is an equidigital number, since it uses as much as digits as its factorization.

381022397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54431778.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 381022397 is about 19519.7950040465. The cubic root of 381022397 is about 724.9646574924.

The spelling of 381022397 in words is "three hundred eighty-one million, twenty-two thousand, three hundred ninety-seven".