1601657503 has 2 divisors, whose sum is σ = 1601657504. Its totient is φ = 1601657502.

The previous prime is 1601657479. The next prime is 1601657513. The reversal of 1601657503 is 3057561061.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1601657503 - 2²⁵ = 1568103071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1601657513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800828751 + 800828752.

It is an arithmetic number, because the mean of its divisors is an integer number (800828752).

Almost surely, 2^1601657503 is an apocalyptic number.

1601657503 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601657503 is an equidigital number, since it uses as much as digits as its factorization.

1601657503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 1601657503 is about 40020.7134244256. The cubic root of 1601657503 is about 1170.0108365812.

The spelling of 1601657503 in words is "one billion, six hundred one million, six hundred fifty-seven thousand, five hundred three".