623783957 has 2 divisors, whose sum is σ = 623783958. Its totient is φ = 623783956.

The previous prime is 623783947. The next prime is 623784013. The reversal of 623783957 is 759387326.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 532409476 + 91374481 = 23074^2 + 9559^2 .

It is a cyclic number.

It is not a de Polignac number, because 623783957 - 2⁸ = 623783701 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 (623783917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311891978 + 311891979.

It is an arithmetic number, because the mean of its divisors is an integer number (311891979).

Almost surely, 2^623783957 is an apocalyptic number.

It is an amenable number.

623783957 is a deficient number, since it is larger than the sum of its proper divisors (1).

623783957 is an equidigital number, since it uses as much as digits as its factorization.

623783957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 50.

The square root of 623783957 is about 24975.6672983926. The cubic root of 623783957 is about 854.4331055116.

The spelling of 623783957 in words is "six hundred twenty-three million, seven hundred eighty-three thousand, nine hundred fifty-seven".