917942 has 4 divisors (see below), whose sum is σ = 1376916. Its totient is φ = 458970.

The previous prime is 917927. The next prime is 917951. The reversal of 917942 is 249719.

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

It is a junction number, because it is equal to n+sod(n) for n = 917899 and 917908.

It is a congruent number.

It is an unprimeable number.

917942 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 229484 + ... + 229487.

It is an arithmetic number, because the mean of its divisors is an integer number (344229).

2⁹¹⁷⁹⁴² is an apocalyptic number.

917942 is a deficient number, since it is larger than the sum of its proper divisors (458974).

917942 is a wasteful number, since it uses less digits than its factorization.

917942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458973.

The product of its digits is 4536, while the sum is 32.

The square root of 917942 is about 958.0928973748. The cubic root of 917942 is about 97.1863071817.

The spelling of 917942 in words is "nine hundred seventeen thousand, nine hundred forty-two".