381975557 has 8 divisors (see below), whose sum is σ = 391849920. Its totient is φ = 372127840.

The previous prime is 381975553. The next prime is 381975577. The reversal of 381975557 is 755579183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 381975557 - 2² = 381975553 is a prime.

It is a super-2 number, since 2×381975557² = 291810652290920498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381975551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24194 + ... + 36732.

It is an arithmetic number, because the mean of its divisors is an integer number (48981240).

Almost surely, 2^381975557 is an apocalyptic number.

It is an amenable number.

381975557 is a deficient number, since it is larger than the sum of its proper divisors (9874363).

381975557 is a wasteful number, since it uses less digits than its factorization.

381975557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13323.

The product of its digits is 1323000, while the sum is 50.

The square root of 381975557 is about 19544.1949693509. The cubic root of 381975557 is about 725.5686743982.

The spelling of 381975557 in words is "three hundred eighty-one million, nine hundred seventy-five thousand, five hundred fifty-seven".