381541907 has 4 divisors (see below), whose sum is σ = 401623080. Its totient is φ = 361460736.

The previous prime is 381541841. The next prime is 381541933. The reversal of 381541907 is 709145183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 709145183 = 9431 ⋅75193.

It is a cyclic number.

It is not a de Polignac number, because 381541907 - 2²² = 377347603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381541997) 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, 10040558 + ... + 10040595.

It is an arithmetic number, because the mean of its divisors is an integer number (100405770).

Almost surely, 2^381541907 is an apocalyptic number.

381541907 is a deficient number, since it is larger than the sum of its proper divisors (20081173).

381541907 is a wasteful number, since it uses less digits than its factorization.

381541907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20081172.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 381541907 is about 19533.0977317987. The cubic root of 381541907 is about 725.2939953910.

The spelling of 381541907 in words is "three hundred eighty-one million, five hundred forty-one thousand, nine hundred seven".