1601610427 has 2 divisors, whose sum is σ = 1601610428. Its totient is φ = 1601610426.

The previous prime is 1601610421. The next prime is 1601610431. The reversal of 1601610427 is 7240161061.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1601610427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1601610395 and 1601610404.

It is not a weakly prime, because it can be changed into another prime (1601610421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800805213 + 800805214.

It is an arithmetic number, because the mean of its divisors is an integer number (800805214).

Almost surely, 2^1601610427 is an apocalyptic number.

1601610427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601610427 is an equidigital number, since it uses as much as digits as its factorization.

1601610427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 1601610427 is about 40020.1252746665. The cubic root of 1601610427 is about 1169.9993734625. Note that the first 3 decimals are identical.

Adding to 1601610427 its reverse (7240161061), we get a palindrome (8841771488).

The spelling of 1601610427 in words is "one billion, six hundred one million, six hundred ten thousand, four hundred twenty-seven".