71742979 has 8 divisors (see below), whose sum is σ = 89445888. Its totient is φ = 55903560.

The previous prime is 71742977. The next prime is 71743019. The reversal of 71742979 is 97924717.

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 71742979 - 2¹ = 71742977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71742977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 465787 + ... + 465940.

It is an arithmetic number, because the mean of its divisors is an integer number (11180736).

Almost surely, 2^71742979 is an apocalyptic number.

71742979 is a deficient number, since it is larger than the sum of its proper divisors (17702909).

71742979 is a wasteful number, since it uses less digits than its factorization.

71742979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931745.

The product of its digits is 222264, while the sum is 46.

The square root of 71742979 is about 8470.1227263836. The cubic root of 71742979 is about 415.5211510494.

It can be divided in two parts, 7174 and 2979, that added together give a triangular number (10153 = T₁₄₂).

The spelling of 71742979 in words is "seventy-one million, seven hundred forty-two thousand, nine hundred seventy-nine".