1601620079 has 2 divisors, whose sum is σ = 1601620080. Its totient is φ = 1601620078.

The previous prime is 1601620063. The next prime is 1601620093. The reversal of 1601620079 is 9700261061.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1601620079 - 2⁴ = 1601620063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1601620039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800810039 + 800810040.

It is an arithmetic number, because the mean of its divisors is an integer number (800810040).

Almost surely, 2^1601620079 is an apocalyptic number.

1601620079 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601620079 is an equidigital number, since it uses as much as digits as its factorization.

1601620079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 1601620079 is about 40020.2458638125. The cubic root of 1601620079 is about 1170.0017237659.

The spelling of 1601620079 in words is "one billion, six hundred one million, six hundred twenty thousand, seventy-nine".