623438447 has 2 divisors, whose sum is σ = 623438448. Its totient is φ = 623438446.

The previous prime is 623438423. The next prime is 623438461. The reversal of 623438447 is 744834326.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 623438447 - 2²⁶ = 556329583 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 (623438477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311719223 + 311719224.

It is an arithmetic number, because the mean of its divisors is an integer number (311719224).

Almost surely, 2^623438447 is an apocalyptic number.

623438447 is a deficient number, since it is larger than the sum of its proper divisors (1).

623438447 is an equidigital number, since it uses as much as digits as its factorization.

623438447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 41.

The square root of 623438447 is about 24968.7494080100. The cubic root of 623438447 is about 854.2753213398.

The spelling of 623438447 in words is "six hundred twenty-three million, four hundred thirty-eight thousand, four hundred forty-seven".