623532031 has 2 divisors, whose sum is σ = 623532032. Its totient is φ = 623532030.

The previous prime is 623532017. The next prime is 623532037. The reversal of 623532031 is 130235326.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 623532031 - 2¹⁵ = 623499263 is a prime.

It is a super-2 number, since 2×623532031² = 777584387365969922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 623531987 and 623532005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623532037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311766015 + 311766016.

It is an arithmetic number, because the mean of its divisors is an integer number (311766016).

Almost surely, 2^623532031 is an apocalyptic number.

623532031 is a deficient number, since it is larger than the sum of its proper divisors (1).

623532031 is an equidigital number, since it uses as much as digits as its factorization.

623532031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 623532031 is about 24970.6233602608. The cubic root of 623532031 is about 854.3180641330.

Adding to 623532031 its reverse (130235326), we get a palindrome (753767357).

The spelling of 623532031 in words is "six hundred twenty-three million, five hundred thirty-two thousand, thirty-one".