507749999 has 4 divisors (see below), whose sum is σ = 537617664. Its totient is φ = 477882336.

The previous prime is 507749981. The next prime is 507750029. The reversal of 507749999 is 999947705.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999947705 = 5 ⋅199989541.

It is a cyclic number.

It is not a de Polignac number, because 507749999 - 2²⁰ = 506701423 is a prime.

It is a super-2 number, since 2×507749999² = 515620122969000002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (507749959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14933807 + ... + 14933840.

It is an arithmetic number, because the mean of its divisors is an integer number (134404416).

Almost surely, 2^507749999 is an apocalyptic number.

507749999 is a deficient number, since it is larger than the sum of its proper divisors (29867665).

507749999 is a wasteful number, since it uses less digits than its factorization.

507749999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29867664.

The product of its (nonzero) digits is 6429780, while the sum is 59.

The square root of 507749999 is about 22533.3086562981. The cubic root of 507749999 is about 797.7803046996.

The spelling of 507749999 in words is "five hundred seven million, seven hundred forty-nine thousand, nine hundred ninety-nine".