71771946 has 8 divisors (see below), whose sum is σ = 143543904. Its totient is φ = 23923980.

The previous prime is 71771933. The next prime is 71771957. The reversal of 71771946 is 64917717.

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

71771946 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 71771898 and 71771907.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5980990 + ... + 5981001.

It is an arithmetic number, because the mean of its divisors is an integer number (17942988).

Almost surely, 2^71771946 is an apocalyptic number.

71771946 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71771946 is a wasteful number, since it uses less digits than its factorization.

71771946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11961996.

The product of its digits is 74088, while the sum is 42.

The square root of 71771946 is about 8471.8325054264. The cubic root of 71771946 is about 415.5770672369.

The spelling of 71771946 in words is "seventy-one million, seven hundred seventy-one thousand, nine hundred forty-six".