551000623 has 2 divisors, whose sum is σ = 551000624. Its totient is φ = 551000622.

The previous prime is 551000573. The next prime is 551000629. The reversal of 551000623 is 326000155.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 551000623 - 2⁹ = 551000111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 551000594 and 551000603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551000629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275500311 + 275500312.

It is an arithmetic number, because the mean of its divisors is an integer number (275500312).

Almost surely, 2^551000623 is an apocalyptic number.

551000623 is a deficient number, since it is larger than the sum of its proper divisors (1).

551000623 is an equidigital number, since it uses as much as digits as its factorization.

551000623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 551000623 is about 23473.4024589534. The cubic root of 551000623 is about 819.8178372870.

Adding to 551000623 its reverse (326000155), we get a palindrome (877000778).

The spelling of 551000623 in words is "five hundred fifty-one million, six hundred twenty-three", and thus it is an aban number.