71400491 has 8 divisors (see below), whose sum is σ = 73436064. Its totient is φ = 69370560.

The previous prime is 71400479. The next prime is 71400509. The reversal of 71400491 is 19400417.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71400491 - 2²² = 67206187 is a prime.

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 71400491.

It is not an unprimeable number, because it can be changed into a prime (71400421) 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, 47471 + ... + 48951.

It is an arithmetic number, because the mean of its divisors is an integer number (9179508).

Almost surely, 2^71400491 is an apocalyptic number.

71400491 is a deficient number, since it is larger than the sum of its proper divisors (2035573).

71400491 is a wasteful number, since it uses less digits than its factorization.

71400491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2821.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 71400491 is about 8449.8811234242. The cubic root of 71400491 is about 414.8588884924.

The spelling of 71400491 in words is "seventy-one million, four hundred thousand, four hundred ninety-one".