517697942 has 4 divisors (see below), whose sum is σ = 776546916. Its totient is φ = 258848970.

The previous prime is 517697897. The next prime is 517697951. The reversal of 517697942 is 249796715.

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

It is a super-2 number, since 2×517697942² = 536022318302070728, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129424484 + ... + 129424487.

It is an arithmetic number, because the mean of its divisors is an integer number (194136729).

Almost surely, 2^517697942 is an apocalyptic number.

517697942 is a deficient number, since it is larger than the sum of its proper divisors (258848974).

517697942 is a wasteful number, since it uses less digits than its factorization.

517697942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258848973.

The product of its digits is 952560, while the sum is 50.

The square root of 517697942 is about 22752.9765525304. The cubic root of 517697942 is about 802.9567367966.

The spelling of 517697942 in words is "five hundred seventeen million, six hundred ninety-seven thousand, nine hundred forty-two".