387396409 has 2 divisors, whose sum is σ = 387396410. Its totient is φ = 387396408.

The previous prime is 387396353. The next prime is 387396437. The reversal of 387396409 is 904693783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 310746384 + 76650025 = 17628^2 + 8755^2 .

It is a cyclic number.

It is not a de Polignac number, because 387396409 - 2⁷ = 387396281 is a prime.

It is not a weakly prime, because it can be changed into another prime (387396809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193698204 + 193698205.

It is an arithmetic number, because the mean of its divisors is an integer number (193698205).

Almost surely, 2^387396409 is an apocalyptic number.

It is an amenable number.

387396409 is a deficient number, since it is larger than the sum of its proper divisors (1).

387396409 is an equidigital number, since it uses as much as digits as its factorization.

387396409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 49.

The square root of 387396409 is about 19682.3882951231. The cubic root of 387396409 is about 728.9848960976.

The spelling of 387396409 in words is "three hundred eighty-seven million, three hundred ninety-six thousand, four hundred nine".