1601920633 has 2 divisors, whose sum is σ = 1601920634. Its totient is φ = 1601920632.

The previous prime is 1601920627. The next prime is 1601920643. The reversal of 1601920633 is 3360291061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1441948729 + 159971904 = 37973^2 + 12648^2 .

It is a cyclic number.

It is not a de Polignac number, because 1601920633 - 2²⁵ = 1568366201 is a prime.

It is a super-2 number, since 2×1601920633² = 5132299428862241378, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1601920595 and 1601920604.

It is not a weakly prime, because it can be changed into another prime (1601920603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800960316 + 800960317.

It is an arithmetic number, because the mean of its divisors is an integer number (800960317).

Almost surely, 2^1601920633 is an apocalyptic number.

It is an amenable number.

1601920633 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601920633 is an equidigital number, since it uses as much as digits as its factorization.

1601920633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 1601920633 is about 40024.0007120728. Note that the first 3 decimals coincide. The cubic root of 1601920633 is about 1170.0749052294.

The spelling of 1601920633 in words is "one billion, six hundred one million, nine hundred twenty thousand, six hundred thirty-three".