491748077 has 8 divisors (see below), whose sum is σ = 493739232. Its totient is φ = 489762000.

The previous prime is 491748029. The next prime is 491748079. The reversal of 491748077 is 770847194.

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 491748077 - 2⁶ = 491748013 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 (491748079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 377327 + ... + 378627.

It is an arithmetic number, because the mean of its divisors is an integer number (61717404).

Almost surely, 2^491748077 is an apocalyptic number.

It is an amenable number.

491748077 is a deficient number, since it is larger than the sum of its proper divisors (1991155).

491748077 is a wasteful number, since it uses less digits than its factorization.

491748077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2539.

The product of its (nonzero) digits is 395136, while the sum is 47.

The square root of 491748077 is about 22175.3935027093. The cubic root of 491748077 is about 789.3099122387.

The spelling of 491748077 in words is "four hundred ninety-one million, seven hundred forty-eight thousand, seventy-seven".