42497723 has 4 divisors (see below), whose sum is σ = 42537768. Its totient is φ = 42457680.

The previous prime is 42497713. The next prime is 42497761. The reversal of 42497723 is 32779424.

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 42497723 - 2¹⁴ = 42481339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42497713) 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, 18386 + ... + 20567.

It is an arithmetic number, because the mean of its divisors is an integer number (10634442).

Almost surely, 2^42497723 is an apocalyptic number.

42497723 is a deficient number, since it is larger than the sum of its proper divisors (40045).

42497723 is a wasteful number, since it uses less digits than its factorization.

42497723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40044.

The product of its digits is 84672, while the sum is 38.

The square root of 42497723 is about 6519.0277649355. The cubic root of 42497723 is about 348.9703699226.

The spelling of 42497723 in words is "forty-two million, four hundred ninety-seven thousand, seven hundred twenty-three".