1604991079 has 2 divisors, whose sum is σ = 1604991080. Its totient is φ = 1604991078.

The previous prime is 1604991007. The next prime is 1604991107. The reversal of 1604991079 is 9701994061.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1604991079 - 2¹¹ = 1604989031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1604491079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802495539 + 802495540.

It is an arithmetic number, because the mean of its divisors is an integer number (802495540).

Almost surely, 2^1604991079 is an apocalyptic number.

1604991079 is a deficient number, since it is larger than the sum of its proper divisors (1).

1604991079 is an equidigital number, since it uses as much as digits as its factorization.

1604991079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 1604991079 is about 40062.3399091965. The cubic root of 1604991079 is about 1170.8219998526.

The spelling of 1604991079 in words is "one billion, six hundred four million, nine hundred ninety-one thousand, seventy-nine".