71454779 has 4 divisors (see below), whose sum is σ = 77950680. Its totient is φ = 64958880.

The previous prime is 71454769. The next prime is 71454781. The reversal of 71454779 is 97745417.

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 71454779 - 2¹² = 71450683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71454749) 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, 3247934 + ... + 3247955.

It is an arithmetic number, because the mean of its divisors is an integer number (19487670).

Almost surely, 2^71454779 is an apocalyptic number.

71454779 is a deficient number, since it is larger than the sum of its proper divisors (6495901).

71454779 is a wasteful number, since it uses less digits than its factorization.

71454779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6495900.

The product of its digits is 246960, while the sum is 44.

The square root of 71454779 is about 8453.0928659278. The cubic root of 71454779 is about 414.9640052005.

The spelling of 71454779 in words is "seventy-one million, four hundred fifty-four thousand, seven hundred seventy-nine".