1604167613 has 2 divisors, whose sum is σ = 1604167614. Its totient is φ = 1604167612.

The previous prime is 1604167603. The next prime is 1604167619. The reversal of 1604167613 is 3167614061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1186251364 + 417916249 = 34442^2 + 20443^2 .

It is a cyclic number.

It is not a de Polignac number, because 1604167613 - 2¹⁸ = 1603905469 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1604167619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802083806 + 802083807.

It is an arithmetic number, because the mean of its divisors is an integer number (802083807).

Almost surely, 2^1604167613 is an apocalyptic number.

It is an amenable number.

1604167613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1604167613 is an equidigital number, since it uses as much as digits as its factorization.

1604167613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 1604167613 is about 40052.0612827854. The cubic root of 1604167613 is about 1170.6217293638.

The spelling of 1604167613 in words is "one billion, six hundred four million, one hundred sixty-seven thousand, six hundred thirteen".