381364877 has 4 divisors (see below), whose sum is σ = 394515420. Its totient is φ = 368214336.

The previous prime is 381364861. The next prime is 381364889. The reversal of 381364877 is 778463183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 778463183 = 9349 ⋅83267.

It can be written as a sum of positive squares in 2 ways, for example, as 132388036 + 248976841 = 11506^2 + 15779^2 .

It is a cyclic number.

It is not a de Polignac number, because 381364877 - 2⁴ = 381364861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381364897) 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, 6575228 + ... + 6575285.

It is an arithmetic number, because the mean of its divisors is an integer number (98628855).

Almost surely, 2^381364877 is an apocalyptic number.

It is an amenable number.

381364877 is a deficient number, since it is larger than the sum of its proper divisors (13150543).

381364877 is a wasteful number, since it uses less digits than its factorization.

381364877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13150542.

The product of its digits is 677376, while the sum is 47.

The square root of 381364877 is about 19528.5656667355. The cubic root of 381364877 is about 725.1818026828.

The spelling of 381364877 in words is "three hundred eighty-one million, three hundred sixty-four thousand, eight hundred seventy-seven".