491926057 has 4 divisors (see below), whose sum is σ = 562201216. Its totient is φ = 421650900.

The previous prime is 491926027. The next prime is 491926069. The reversal of 491926057 is 750629194.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 491926057 - 2¹¹ = 491924009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491926027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35137569 + ... + 35137582.

It is an arithmetic number, because the mean of its divisors is an integer number (140550304).

Almost surely, 2^491926057 is an apocalyptic number.

It is an amenable number.

491926057 is a deficient number, since it is larger than the sum of its proper divisors (70275159).

491926057 is an equidigital number, since it uses as much as digits as its factorization.

491926057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70275158.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 491926057 is about 22179.4061462430. The cubic root of 491926057 is about 789.4051265974.

It can be divided in two parts, 4919 and 26057, that added together give a square (30976 = 176²).

The spelling of 491926057 in words is "four hundred ninety-one million, nine hundred twenty-six thousand, fifty-seven".