71740891 has 8 divisors (see below), whose sum is σ = 74010320. Its totient is φ = 69488928.

The previous prime is 71740883. The next prime is 71740919. The reversal of 71740891 is 19804717.

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 71740891 - 2³ = 71740883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71740891.

It is not an unprimeable number, because it can be changed into a prime (71740811) 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, 4240 + ... + 12706.

It is an arithmetic number, because the mean of its divisors is an integer number (9251290).

Almost surely, 2^71740891 is an apocalyptic number.

71740891 is a deficient number, since it is larger than the sum of its proper divisors (2269429).

71740891 is a wasteful number, since it uses less digits than its factorization.

71740891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8733.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 71740891 is about 8469.9994687131. Note that the first 3 decimals coincide. The cubic root of 71740891 is about 415.5171199158.

The spelling of 71740891 in words is "seventy-one million, seven hundred forty thousand, eight hundred ninety-one".