71189949 has 8 divisors (see below), whose sum is σ = 95898880. Its totient is φ = 46970496.

The previous prime is 71189939. The next prime is 71189957. The reversal of 71189949 is 94998117.

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

It is not a de Polignac number, because 71189949 - 2²⁰ = 70141373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71189898 and 71189907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71189939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122029 + ... + 122610.

It is an arithmetic number, because the mean of its divisors is an integer number (11987360).

Almost surely, 2^71189949 is an apocalyptic number.

It is an amenable number.

71189949 is a deficient number, since it is larger than the sum of its proper divisors (24708931).

71189949 is a wasteful number, since it uses less digits than its factorization.

71189949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244739.

The product of its digits is 163296, while the sum is 48.

The square root of 71189949 is about 8437.4136440025. The cubic root of 71189949 is about 414.4507156970.

The spelling of 71189949 in words is "seventy-one million, one hundred eighty-nine thousand, nine hundred forty-nine".