620707397 has 2 divisors, whose sum is σ = 620707398. Its totient is φ = 620707396.

The previous prime is 620707361. The next prime is 620707429. The reversal of 620707397 is 793707026.

It is a Cunningham number, because it is equal to 24914²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 620707396 + 1 = 24914^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 620707397 - 2¹⁴ = 620691013 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620703397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310353698 + 310353699.

It is an arithmetic number, because the mean of its divisors is an integer number (310353699).

Almost surely, 2^620707397 is an apocalyptic number.

It is an amenable number.

620707397 is a deficient number, since it is larger than the sum of its proper divisors (1).

620707397 is an equidigital number, since it uses as much as digits as its factorization.

620707397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 111132, while the sum is 41.

The square root of 620707397 is about 24914.0000200690. Note that the first 4 decimals coincide. The cubic root of 620707397 is about 853.0260754792.

The spelling of 620707397 in words is "six hundred twenty million, seven hundred seven thousand, three hundred ninety-seven".