378371999 has 8 divisors (see below), whose sum is σ = 381179520. Its totient is φ = 375574936.

The previous prime is 378371977. The next prime is 378372013. The reversal of 378371999 is 999173873.

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 378371999 - 2¹² = 378367903 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 (378371969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79172 + ... + 83814.

It is an arithmetic number, because the mean of its divisors is an integer number (47647440).

Almost surely, 2^378371999 is an apocalyptic number.

378371999 is a deficient number, since it is larger than the sum of its proper divisors (2807521).

378371999 is a wasteful number, since it uses less digits than its factorization.

378371999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5229.

The product of its digits is 2571912, while the sum is 56.

The square root of 378371999 is about 19451.7865246357. The cubic root of 378371999 is about 723.2797894538.

The spelling of 378371999 in words is "three hundred seventy-eight million, three hundred seventy-one thousand, nine hundred ninety-nine".