1620297613 has 8 divisors (see below), whose sum is σ = 1771470720. Its totient is φ = 1469770080.

The previous prime is 1620297571. The next prime is 1620297631. The reversal of 1620297613 is 3167920261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1620297613 - 2⁹ = 1620297101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620297643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156133 + ... + 166186.

It is an arithmetic number, because the mean of its divisors is an integer number (221433840).

Almost surely, 2^1620297613 is an apocalyptic number.

It is an amenable number.

1620297613 is a deficient number, since it is larger than the sum of its proper divisors (151173107).

1620297613 is a wasteful number, since it uses less digits than its factorization.

1620297613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322787.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 1620297613 is about 40252.9205524270. The cubic root of 1620297613 is about 1174.5322086570.

The spelling of 1620297613 in words is "one billion, six hundred twenty million, two hundred ninety-seven thousand, six hundred thirteen".