623860691 has 2 divisors, whose sum is σ = 623860692. Its totient is φ = 623860690.

The previous prime is 623860681. The next prime is 623860711. The reversal of 623860691 is 196068326.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 623860691 - 2¹⁰ = 623859667 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (623860621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311930345 + 311930346.

It is an arithmetic number, because the mean of its divisors is an integer number (311930346).

Almost surely, 2^623860691 is an apocalyptic number.

623860691 is a deficient number, since it is larger than the sum of its proper divisors (1).

623860691 is an equidigital number, since it uses as much as digits as its factorization.

623860691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 623860691 is about 24977.2034263246. The cubic root of 623860691 is about 854.4681397468.

The spelling of 623860691 in words is "six hundred twenty-three million, eight hundred sixty thousand, six hundred ninety-one".