491957607 has 8 divisors (see below), whose sum is σ = 668319984. Its totient is φ = 321783488.

The previous prime is 491957597. The next prime is 491957629. The reversal of 491957607 is 706759194.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 491957607 - 2²³ = 483568999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491957677) 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 7 ways as a sum of consecutive naturals, for example, 1546878 + ... + 1547195.

It is an arithmetic number, because the mean of its divisors is an integer number (83539998).

Almost surely, 2^491957607 is an apocalyptic number.

491957607 is a deficient number, since it is larger than the sum of its proper divisors (176362377).

491957607 is a wasteful number, since it uses less digits than its factorization.

491957607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3094129.

The product of its (nonzero) digits is 476280, while the sum is 48.

The square root of 491957607 is about 22180.1173802124. The cubic root of 491957607 is about 789.4220025749.

It can be divided in two parts, 4919 and 57607, that added together give a palindrome (62526).

The spelling of 491957607 in words is "four hundred ninety-one million, nine hundred fifty-seven thousand, six hundred seven".