378979837 has 4 divisors (see below), whose sum is σ = 379437820. Its totient is φ = 378521856.

The previous prime is 378979819. The next prime is 378979841. The reversal of 378979837 is 738979873.

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

It can be written as a sum of positive squares in 2 ways, for example, as 242300356 + 136679481 = 15566^2 + 11691^2 .

It is a cyclic number.

It is not a de Polignac number, because 378979837 - 2²³ = 370591229 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 (378979807) 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, 227748 + ... + 229405.

It is an arithmetic number, because the mean of its divisors is an integer number (94859455).

Almost surely, 2^378979837 is an apocalyptic number.

It is an amenable number.

378979837 is a deficient number, since it is larger than the sum of its proper divisors (457983).

378979837 is an equidigital number, since it uses as much as digits as its factorization.

378979837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457982.

The product of its digits is 16003008, while the sum is 61.

The square root of 378979837 is about 19467.4044751734. The cubic root of 378979837 is about 723.6668879816. Note that the first 3 decimals are identical.

The spelling of 378979837 in words is "three hundred seventy-eight million, nine hundred seventy-nine thousand, eight hundred thirty-seven".