1604405357 has 2 divisors, whose sum is σ = 1604405358. Its totient is φ = 1604405356.

The previous prime is 1604405291. The next prime is 1604405371. The reversal of 1604405357 is 7535044061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1346449636 + 257955721 = 36694^2 + 16061^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1604405357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1604405057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802202678 + 802202679.

It is an arithmetic number, because the mean of its divisors is an integer number (802202679).

Almost surely, 2^1604405357 is an apocalyptic number.

It is an amenable number.

1604405357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1604405357 is an equidigital number, since it uses as much as digits as its factorization.

1604405357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 1604405357 is about 40055.0291099632. The cubic root of 1604405357 is about 1170.6795567676.

The spelling of 1604405357 in words is "one billion, six hundred four million, four hundred five thousand, three hundred fifty-seven".