42493897 has 4 divisors (see below), whose sum is σ = 44993556. Its totient is φ = 39994240.

The previous prime is 42493849. The next prime is 42493907. The reversal of 42493897 is 79839424.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 38887696 + 3606201 = 6236^2 + 1899^2 .

It is a cyclic number.

It is not a de Polignac number, because 42493897 - 2¹⁵ = 42461129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42493807) 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, 1249804 + ... + 1249837.

It is an arithmetic number, because the mean of its divisors is an integer number (11248389).

Almost surely, 2^42493897 is an apocalyptic number.

It is an amenable number.

42493897 is a deficient number, since it is larger than the sum of its proper divisors (2499659).

42493897 is a wasteful number, since it uses less digits than its factorization.

42493897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2499658.

The product of its digits is 435456, while the sum is 46.

The square root of 42493897 is about 6518.7343096647. The cubic root of 42493897 is about 348.9598971991.

The spelling of 42493897 in words is "forty-two million, four hundred ninety-three thousand, eight hundred ninety-seven".