1601522969 has 2 divisors, whose sum is σ = 1601522970. Its totient is φ = 1601522968.

The previous prime is 1601522957. The next prime is 1601522971. The reversal of 1601522969 is 9692251061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1161991744 + 439531225 = 34088^2 + 20965^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1601522969 is a prime.

It is a super-2 number, since 2×1601522969² = 5129751640469149922, which contains 22 as substring.

Together with 1601522971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1601522669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800761484 + 800761485.

It is an arithmetic number, because the mean of its divisors is an integer number (800761485).

Almost surely, 2^1601522969 is an apocalyptic number.

It is an amenable number.

1601522969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601522969 is an equidigital number, since it uses as much as digits as its factorization.

1601522969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 1601522969 is about 40019.0325845091. The cubic root of 1601522969 is about 1169.9780766340.

The spelling of 1601522969 in words is "one billion, six hundred one million, five hundred twenty-two thousand, nine hundred sixty-nine".