507748991 has 4 divisors (see below), whose sum is σ = 507896400. Its totient is φ = 507601584.

The previous prime is 507748973. The next prime is 507748993. The reversal of 507748991 is 199847705.

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

It is a cyclic number.

It is not a de Polignac number, because 507748991 - 2¹⁰ = 507747967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (507748993) 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, 68411 + ... + 75468.

It is an arithmetic number, because the mean of its divisors is an integer number (126974100).

Almost surely, 2^507748991 is an apocalyptic number.

507748991 is a deficient number, since it is larger than the sum of its proper divisors (147409).

507748991 is a wasteful number, since it uses less digits than its factorization.

507748991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147408.

The product of its (nonzero) digits is 635040, while the sum is 50.

The square root of 507748991 is about 22533.2862893986. The cubic root of 507748991 is about 797.7797767737.

The spelling of 507748991 in words is "five hundred seven million, seven hundred forty-eight thousand, nine hundred ninety-one".