71473751 has 4 divisors (see below), whose sum is σ = 73405512. Its totient is φ = 69541992.

The previous prime is 71473747. The next prime is 71473781. The reversal of 71473751 is 15737417.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71473751 - 2² = 71473747 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71473781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 965825 + ... + 965898.

It is an arithmetic number, because the mean of its divisors is an integer number (18351378).

Almost surely, 2^71473751 is an apocalyptic number.

71473751 is a deficient number, since it is larger than the sum of its proper divisors (1931761).

71473751 is a wasteful number, since it uses less digits than its factorization.

71473751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1931760.

The product of its digits is 20580, while the sum is 35.

The square root of 71473751 is about 8454.2149842549. The cubic root of 71473751 is about 415.0007277289. Note that the first 3 decimals are identical.

The spelling of 71473751 in words is "seventy-one million, four hundred seventy-three thousand, seven hundred fifty-one".