1620341931 has 8 divisors (see below), whose sum is σ = 2326644880. Its totient is φ = 997133472.

The previous prime is 1620341909. The next prime is 1620341939. The reversal of 1620341931 is 1391430261.

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

It is not a de Polignac number, because 1620341931 - 2³⁰ = 546600107 is a prime.

It is a super-2 number, since 2×1620341931² = 5251015946713617522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1620341939) 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, 20773576 + ... + 20773653.

It is an arithmetic number, because the mean of its divisors is an integer number (290830610).

Almost surely, 2^1620341931 is an apocalyptic number.

1620341931 is a deficient number, since it is larger than the sum of its proper divisors (706302949).

1620341931 is a wasteful number, since it uses less digits than its factorization.

1620341931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41547245.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 1620341931 is about 40253.4710428803. The cubic root of 1620341931 is about 1174.5429170691.

The spelling of 1620341931 in words is "one billion, six hundred twenty million, three hundred forty-one thousand, nine hundred thirty-one".