618820937 has 16 divisors (see below), whose sum is σ = 770121600. Its totient is φ = 485170560.

The previous prime is 618820933. The next prime is 618820963. The reversal of 618820937 is 739028816.

It is not a de Polignac number, because 618820937 - 2² = 618820933 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (618820933) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76364 + ... + 84077.

It is an arithmetic number, because the mean of its divisors is an integer number (48132600).

Almost surely, 2^618820937 is an apocalyptic number.

It is an amenable number.

618820937 is a deficient number, since it is larger than the sum of its proper divisors (151300663).

618820937 is a wasteful number, since it uses less digits than its factorization.

618820937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160496.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 618820937 is about 24876.1117741499. Note that the first 3 decimals coincide. The cubic root of 618820937 is about 852.1610234606.

The spelling of 618820937 in words is "six hundred eighteen million, eight hundred twenty thousand, nine hundred thirty-seven".