378599399 has 2 divisors, whose sum is σ = 378599400. Its totient is φ = 378599398.

The previous prime is 378599393. The next prime is 378599407. The reversal of 378599399 is 993995873.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 378599399 - 2⁴ = 378599383 is a prime.

It is a super-2 number, since 2×378599399² = 286675009846322402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378599393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189299699 + 189299700.

It is an arithmetic number, because the mean of its divisors is an integer number (189299700).

Almost surely, 2^378599399 is an apocalyptic number.

378599399 is a deficient number, since it is larger than the sum of its proper divisors (1).

378599399 is an equidigital number, since it uses as much as digits as its factorization.

378599399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16533720, while the sum is 62.

The square root of 378599399 is about 19457.6308681196. The cubic root of 378599399 is about 723.4246564860.

The spelling of 378599399 in words is "three hundred seventy-eight million, five hundred ninety-nine thousand, three hundred ninety-nine".