1603256957 has 2 divisors, whose sum is σ = 1603256958. Its totient is φ = 1603256956.

The previous prime is 1603256891. The next prime is 1603256969. The reversal of 1603256957 is 7596523061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1579188121 + 24068836 = 39739^2 + 4906^2 .

It is a cyclic number.

It is not a de Polignac number, because 1603256957 - 2¹⁰ = 1603255933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1603256857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 801628478 + 801628479.

It is an arithmetic number, because the mean of its divisors is an integer number (801628479).

Almost surely, 2^1603256957 is an apocalyptic number.

It is an amenable number.

1603256957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1603256957 is an equidigital number, since it uses as much as digits as its factorization.

1603256957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 340200, while the sum is 44.

The square root of 1603256957 is about 40040.6912652616. The cubic root of 1603256957 is about 1170.4001740685.

The spelling of 1603256957 in words is "one billion, six hundred three million, two hundred fifty-six thousand, nine hundred fifty-seven".