71730491 has 32 divisors (see below), whose sum is σ = 91238400. Its totient is φ = 54980640.

The previous prime is 71730473. The next prime is 71730541. The reversal of 71730491 is 19403717.

It is a cyclic number.

It is not a de Polignac number, because 71730491 - 2¹⁸ = 71468347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71730431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 400640 + ... + 400818.

It is an arithmetic number, because the mean of its divisors is an integer number (2851200).

Almost surely, 2^71730491 is an apocalyptic number.

71730491 is a deficient number, since it is larger than the sum of its proper divisors (19507909).

71730491 is a wasteful number, since it uses less digits than its factorization.

71730491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 71730491 is about 8469.3855149001. The cubic root of 71730491 is about 415.4970403080.

The spelling of 71730491 in words is "seventy-one million, seven hundred thirty thousand, four hundred ninety-one".