620494937 has 2 divisors, whose sum is σ = 620494938. Its totient is φ = 620494936.

The previous prime is 620494909. The next prime is 620494939. The reversal of 620494937 is 739494026.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 618467161 + 2027776 = 24869^2 + 1424^2 .

It is a cyclic number.

It is not a de Polignac number, because 620494937 - 2⁶ = 620494873 is a prime.

Together with 620494939, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (620494939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310247468 + 310247469.

It is an arithmetic number, because the mean of its divisors is an integer number (310247469).

Almost surely, 2^620494937 is an apocalyptic number.

It is an amenable number.

620494937 is a deficient number, since it is larger than the sum of its proper divisors (1).

620494937 is an equidigital number, since it uses as much as digits as its factorization.

620494937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 44.

The square root of 620494937 is about 24909.7357874386. The cubic root of 620494937 is about 852.9287378271.

The spelling of 620494937 in words is "six hundred twenty million, four hundred ninety-four thousand, nine hundred thirty-seven".