491040279 has 16 divisors (see below), whose sum is σ = 750935040. Its totient is φ = 316799640.

The previous prime is 491040239. The next prime is 491040281. The reversal of 491040279 is 972040194.

It is not a de Polignac number, because 491040279 - 2⁹ = 491039767 is a prime.

It is a super-2 number, since 2×491040279² = 482241111200795682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491040229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 292497 + ... + 294170.

It is an arithmetic number, because the mean of its divisors is an integer number (46933440).

Almost surely, 2^491040279 is an apocalyptic number.

491040279 is a deficient number, since it is larger than the sum of its proper divisors (259894761).

491040279 is a wasteful number, since it uses less digits than its factorization.

491040279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586707 (or 586701 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 491040279 is about 22159.4286704328. The cubic root of 491040279 is about 788.9310324426.

The spelling of 491040279 in words is "four hundred ninety-one million, forty thousand, two hundred seventy-nine".