71742879 has 48 divisors (see below), whose sum is σ = 119683200. Its totient is φ = 41041728.

The previous prime is 71742871. The next prime is 71742887. The reversal of 71742879 is 97824717.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (71742871) and next prime (71742887).

It is not a de Polignac number, because 71742879 - 2³ = 71742871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71742871) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 130884 + ... + 131430.

It is an arithmetic number, because the mean of its divisors is an integer number (2493400).

Almost surely, 2^71742879 is an apocalyptic number.

71742879 is a deficient number, since it is larger than the sum of its proper divisors (47940321).

71742879 is a wasteful number, since it uses less digits than its factorization.

71742879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644 (or 641 counting only the distinct ones).

The product of its digits is 197568, while the sum is 45.

The square root of 71742879 is about 8470.1168232794. The cubic root of 71742879 is about 415.5209579892.

The spelling of 71742879 in words is "seventy-one million, seven hundred forty-two thousand, eight hundred seventy-nine".