1423744057 has 4 divisors (see below), whose sum is σ = 1433986960. Its totient is φ = 1413501156.

The previous prime is 1423744031. The next prime is 1423744079. The reversal of 1423744057 is 7504473241.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7504473241 = 1669 ⋅4496389.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1423744057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1423744027) 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, 5121243 + ... + 5121520.

It is an arithmetic number, because the mean of its divisors is an integer number (358496740).

Almost surely, 2^1423744057 is an apocalyptic number.

It is an amenable number.

1423744057 is a deficient number, since it is larger than the sum of its proper divisors (10242903).

1423744057 is a wasteful number, since it uses less digits than its factorization.

1423744057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10242902.

The product of its (nonzero) digits is 94080, while the sum is 37.

The square root of 1423744057 is about 37732.5331378639. The cubic root of 1423744057 is about 1124.9778581980.

The spelling of 1423744057 in words is "one billion, four hundred twenty-three million, seven hundred forty-four thousand, fifty-seven".