491171070 has 32 divisors (see below), whose sum is σ = 1269489312. Its totient is φ = 120903552.

The previous prime is 491171063. The next prime is 491171077. The reversal of 491171070 is 70171194.

It is an interprime number because it is at equal distance from previous prime (491171063) and next prime (491171077).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491171077) 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, 629317 + ... + 630096.

It is an arithmetic number, because the mean of its divisors is an integer number (39671541).

Almost surely, 2^491171070 is an apocalyptic number.

491171070 is an abundant number, since it is smaller than the sum of its proper divisors (778318242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

491171070 is a wasteful number, since it uses less digits than its factorization.

491171070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259436.

The product of its (nonzero) digits is 1764, while the sum is 30.

The square root of 491171070 is about 22162.3796105021. The cubic root of 491171070 is about 789.0010714483.

The spelling of 491171070 in words is "four hundred ninety-one million, one hundred seventy-one thousand, seventy".