523423997 has 2 divisors, whose sum is σ = 523423998. Its totient is φ = 523423996.

The previous prime is 523423973. The next prime is 523424009. The reversal of 523423997 is 799324325.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 491996761 + 31427236 = 22181^2 + 5606^2 .

It is a cyclic number.

It is not a de Polignac number, because 523423997 - 2⁸ = 523423741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (523423937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261711998 + 261711999.

It is an arithmetic number, because the mean of its divisors is an integer number (261711999).

Almost surely, 2^523423997 is an apocalyptic number.

It is an amenable number.

523423997 is a deficient number, since it is larger than the sum of its proper divisors (1).

523423997 is an equidigital number, since it uses as much as digits as its factorization.

523423997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 44.

The square root of 523423997 is about 22878.4614211708. The cubic root of 523423997 is about 805.9062858612.

The spelling of 523423997 in words is "five hundred twenty-three million, four hundred twenty-three thousand, nine hundred ninety-seven".