623143477 has 4 divisors (see below), whose sum is σ = 679792896. Its totient is φ = 566494060.

The previous prime is 623143471. The next prime is 623143501. The reversal of 623143477 is 774341326.

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 not a de Polignac number, because 623143477 - 2²³ = 614754869 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 (623143471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28324693 + ... + 28324714.

It is an arithmetic number, because the mean of its divisors is an integer number (169948224).

Almost surely, 2^623143477 is an apocalyptic number.

It is an amenable number.

623143477 is a deficient number, since it is larger than the sum of its proper divisors (56649419).

623143477 is a wasteful number, since it uses less digits than its factorization.

623143477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56649418.

The product of its digits is 84672, while the sum is 37.

The square root of 623143477 is about 24962.8419255501. The cubic root of 623143477 is about 854.1405711523.

The spelling of 623143477 in words is "six hundred twenty-three million, one hundred forty-three thousand, four hundred seventy-seven".