381378077 has 4 divisors (see below), whose sum is σ = 381886656. Its totient is φ = 380869500.

The previous prime is 381378071. The next prime is 381378091. The reversal of 381378077 is 770873183.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 381378077 - 2¹² = 381373981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381378071) 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, 253163 + ... + 254664.

It is an arithmetic number, because the mean of its divisors is an integer number (95471664).

Almost surely, 2^381378077 is an apocalyptic number.

It is an amenable number.

381378077 is a deficient number, since it is larger than the sum of its proper divisors (508579).

381378077 is an equidigital number, since it uses as much as digits as its factorization.

381378077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508578.

The product of its (nonzero) digits is 197568, while the sum is 44.

The square root of 381378077 is about 19528.9036302605. The cubic root of 381378077 is about 725.1901693765.

The spelling of 381378077 in words is "three hundred eighty-one million, three hundred seventy-eight thousand, seventy-seven".