523451009 has 4 divisors (see below), whose sum is σ = 532323120. Its totient is φ = 514578900.

The previous prime is 523451003. The next prime is 523451017. The reversal of 523451009 is 900154325.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 523451009 - 2²⁴ = 506673793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (523451003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4435967 + ... + 4436084.

It is an arithmetic number, because the mean of its divisors is an integer number (133080780).

Almost surely, 2^523451009 is an apocalyptic number.

523451009 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

523451009 is a deficient number, since it is larger than the sum of its proper divisors (8872111).

523451009 is an equidigital number, since it uses as much as digits as its factorization.

523451009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8872110.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 523451009 is about 22879.0517504550. The cubic root of 523451009 is about 805.9201489156.

The spelling of 523451009 in words is "five hundred twenty-three million, four hundred fifty-one thousand, nine".