406023503 has 4 divisors (see below), whose sum is σ = 412679688. Its totient is φ = 399367320.

The previous prime is 406023493. The next prime is 406023547. The reversal of 406023503 is 305320604.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 406023503 - 2⁴ = 406023487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406023203) 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, 3328001 + ... + 3328122.

It is an arithmetic number, because the mean of its divisors is an integer number (103169922).

Almost surely, 2^406023503 is an apocalyptic number.

406023503 is a deficient number, since it is larger than the sum of its proper divisors (6656185).

406023503 is an equidigital number, since it uses as much as digits as its factorization.

406023503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6656184.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 406023503 is about 20150.0248883221. The cubic root of 406023503 is about 740.4863512124.

The spelling of 406023503 in words is "four hundred six million, twenty-three thousand, five hundred three".