42389737 has 4 divisors (see below), whose sum is σ = 45650500. Its totient is φ = 39128976.

The previous prime is 42389717. The next prime is 42389749. The reversal of 42389737 is 73798324.

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 8003241 + 34386496 = 2829^2 + 5864^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42389737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42389693 and 42389702.

It is not an unprimeable number, because it can be changed into a prime (42389707) 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, 1630362 + ... + 1630387.

It is an arithmetic number, because the mean of its divisors is an integer number (11412625).

Almost surely, 2^42389737 is an apocalyptic number.

It is an amenable number.

42389737 is a deficient number, since it is larger than the sum of its proper divisors (3260763).

42389737 is a wasteful number, since it uses less digits than its factorization.

42389737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3260762.

The product of its digits is 254016, while the sum is 43.

The square root of 42389737 is about 6510.7401268980. The cubic root of 42389737 is about 348.6745432688.

The spelling of 42389737 in words is "forty-two million, three hundred eighty-nine thousand, seven hundred thirty-seven".