71261979 has 8 divisors (see below), whose sum is σ = 95134992. Its totient is φ = 47448480.

The previous prime is 71261959. The next prime is 71261999. The reversal of 71261979 is 97916217.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (71261959) and next prime (71261999).

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

It is not a de Polignac number, because 71261979 - 2¹² = 71257883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71261979.

It is not an unprimeable number, because it can be changed into a prime (71261929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12004 + ... + 16929.

It is an arithmetic number, because the mean of its divisors is an integer number (11891874).

Almost surely, 2^71261979 is an apocalyptic number.

71261979 is a deficient number, since it is larger than the sum of its proper divisors (23873013).

71261979 is a wasteful number, since it uses less digits than its factorization.

71261979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29757.

The product of its digits is 47628, while the sum is 42.

The square root of 71261979 is about 8441.6810529657. The cubic root of 71261979 is about 414.5904490102.

The spelling of 71261979 in words is "seventy-one million, two hundred sixty-one thousand, nine hundred seventy-nine".