42347817 has 6 divisors (see below), whose sum is σ = 61169082. Its totient is φ = 28231872.

The previous prime is 42347813. The next prime is 42347821. The reversal of 42347817 is 71874324.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42347813) and next prime (42347821).

It can be written as a sum of positive squares in only one way, i.e., 32387481 + 9960336 = 5691^2 + 3156^2 .

It is not a de Polignac number, because 42347817 - 2² = 42347813 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42347813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2352648 + ... + 2352665.

It is an arithmetic number, because the mean of its divisors is an integer number (10194847).

Almost surely, 2^42347817 is an apocalyptic number.

It is an amenable number.

42347817 is a deficient number, since it is larger than the sum of its proper divisors (18821265).

42347817 is a wasteful number, since it uses less digits than its factorization.

42347817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4705319 (or 4705316 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 42347817 is about 6507.5200345446. The cubic root of 42347817 is about 348.5595684448.

The spelling of 42347817 in words is "forty-two million, three hundred forty-seven thousand, eight hundred seventeen".