1609377139 has 2 divisors, whose sum is σ = 1609377140. Its totient is φ = 1609377138.

The previous prime is 1609377113. The next prime is 1609377257. The reversal of 1609377139 is 9317739061.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1609377139 - 2¹³ = 1609368947 is a prime.

It is not a weakly prime, because it can be changed into another prime (1609377739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 804688569 + 804688570.

It is an arithmetic number, because the mean of its divisors is an integer number (804688570).

Almost surely, 2^1609377139 is an apocalyptic number.

1609377139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1609377139 is an equidigital number, since it uses as much as digits as its factorization.

1609377139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 214326, while the sum is 46.

The square root of 1609377139 is about 40117.0429992042. The cubic root of 1609377139 is about 1171.8875560933.

The spelling of 1609377139 in words is "one billion, six hundred nine million, three hundred seventy-seven thousand, one hundred thirty-nine".