381292091 has 6 divisors (see below), whose sum is σ = 398591340. Its totient is φ = 364713668.

The previous prime is 381292049. The next prime is 381292103. The reversal of 381292091 is 190292183.

It is not a de Polignac number, because 381292091 - 2⁶ = 381292027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381292291) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 359861 + ... + 360918.

It is an arithmetic number, because the mean of its divisors is an integer number (66431890).

Almost surely, 2^381292091 is an apocalyptic number.

381292091 is a deficient number, since it is larger than the sum of its proper divisors (17299249).

381292091 is an equidigital number, since it uses as much as digits as its factorization.

381292091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720825 (or 720802 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 381292091 is about 19526.7020000818. The cubic root of 381292091 is about 725.1356645054.

The spelling of 381292091 in words is "three hundred eighty-one million, two hundred ninety-two thousand, ninety-one".