1223473657 has 4 divisors (see below), whose sum is σ = 1398255616. Its totient is φ = 1048691700.

The previous prime is 1223473651. The next prime is 1223473679. The reversal of 1223473657 is 7563743221.

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 1223473657 - 2⁷ = 1223473529 is a prime.

It is a super-3 number, since 3×1223473657³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223473651) 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, 87390969 + ... + 87390982.

It is an arithmetic number, because the mean of its divisors is an integer number (349563904).

Almost surely, 2^1223473657 is an apocalyptic number.

It is an amenable number.

1223473657 is a deficient number, since it is larger than the sum of its proper divisors (174781959).

1223473657 is an equidigital number, since it uses as much as digits as its factorization.

1223473657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174781958.

The product of its digits is 211680, while the sum is 40.

The square root of 1223473657 is about 34978.1883035700. The cubic root of 1223473657 is about 1069.5428964353.

The spelling of 1223473657 in words is "one billion, two hundred twenty-three million, four hundred seventy-three thousand, six hundred fifty-seven".