381900418979 has 4 divisors (see below), whose sum is σ = 383838999984. Its totient is φ = 379961837976.

The previous prime is 381900418973. The next prime is 381900418981. The reversal of 381900418979 is 979814009183.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381900418979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381900418973) 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, 969290207 + ... + 969290600.

It is an arithmetic number, because the mean of its divisors is an integer number (95959749996).

Almost surely, 2^381900418979 is an apocalyptic number.

381900418979 is a deficient number, since it is larger than the sum of its proper divisors (1938581005).

381900418979 is a wasteful number, since it uses less digits than its factorization.

381900418979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1938581004.

The product of its (nonzero) digits is 3919104, while the sum is 59.

The spelling of 381900418979 in words is "three hundred eighty-one billion, nine hundred million, four hundred eighteen thousand, nine hundred seventy-nine".