506705998 has 4 divisors (see below), whose sum is σ = 760059000. Its totient is φ = 253352998.

The previous prime is 506705977. The next prime is 506706043. The reversal of 506705998 is 899507605.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 899507605 = 5 ⋅179901521.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 126676498 + ... + 126676501.

It is an arithmetic number, because the mean of its divisors is an integer number (190014750).

Almost surely, 2^506705998 is an apocalyptic number.

506705998 is a deficient number, since it is larger than the sum of its proper divisors (253353002).

506705998 is a wasteful number, since it uses less digits than its factorization.

506705998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253353001.

The product of its (nonzero) digits is 680400, while the sum is 49.

The square root of 506705998 is about 22510.1310080595. The cubic root of 506705998 is about 797.2331489931.

The spelling of 506705998 in words is "five hundred six million, seven hundred five thousand, nine hundred ninety-eight".