623651797 has 2 divisors, whose sum is σ = 623651798. Its totient is φ = 623651796.

The previous prime is 623651767. The next prime is 623651803. The reversal of 623651797 is 797156326.

623651797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 385690321 + 237961476 = 19639^2 + 15426^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-623651797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623651737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311825898 + 311825899.

It is an arithmetic number, because the mean of its divisors is an integer number (311825899).

Almost surely, 2^623651797 is an apocalyptic number.

It is an amenable number.

623651797 is a deficient number, since it is larger than the sum of its proper divisors (1).

623651797 is an equidigital number, since it uses as much as digits as its factorization.

623651797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476280, while the sum is 46.

The square root of 623651797 is about 24973.0213830846. The cubic root of 623651797 is about 854.3727588409.

The spelling of 623651797 in words is "six hundred twenty-three million, six hundred fifty-one thousand, seven hundred ninety-seven".