491701970 has 16 divisors (see below), whose sum is σ = 885342528. Its totient is φ = 196618800.

The previous prime is 491701957. The next prime is 491701979. The reversal of 491701970 is 79107194.

It is not an unprimeable number, because it can be changed into a prime (491701979) 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, 38987 + ... + 50033.

It is an arithmetic number, because the mean of its divisors is an integer number (55333908).

Almost surely, 2^491701970 is an apocalyptic number.

491701970 is a deficient number, since it is larger than the sum of its proper divisors (393640558).

491701970 is a wasteful number, since it uses less digits than its factorization.

491701970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15505.

The product of its (nonzero) digits is 15876, while the sum is 38.

The square root of 491701970 is about 22174.3538801021. The cubic root of 491701970 is about 789.2852425272.

The spelling of 491701970 in words is "four hundred ninety-one million, seven hundred one thousand, nine hundred seventy".