394109377 has 2 divisors, whose sum is σ = 394109378. Its totient is φ = 394109376.

The previous prime is 394109369. The next prime is 394109389. The reversal of 394109377 is 773901493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220106896 + 174002481 = 14836^2 + 13191^2 .

It is a cyclic number.

It is not a de Polignac number, because 394109377 - 2³ = 394109369 is a prime.

It is not a weakly prime, because it can be changed into another prime (394119377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197054688 + 197054689.

It is an arithmetic number, because the mean of its divisors is an integer number (197054689).

Almost surely, 2^394109377 is an apocalyptic number.

It is an amenable number.

394109377 is a deficient number, since it is larger than the sum of its proper divisors (1).

394109377 is an equidigital number, since it uses as much as digits as its factorization.

394109377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 142884, while the sum is 43.

The square root of 394109377 is about 19852.1882169196. The cubic root of 394109377 is about 733.1715248830.

The spelling of 394109377 in words is "three hundred ninety-four million, one hundred nine thousand, three hundred seventy-seven".