71809325 has 12 divisors (see below), whose sum is σ = 101764320. Its totient is φ = 49240560.

The previous prime is 71809321. The next prime is 71809337. The reversal of 71809325 is 52390817.

It is not a de Polignac number, because 71809325 - 2² = 71809321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71809321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 204995 + ... + 205344.

It is an arithmetic number, because the mean of its divisors is an integer number (8480360).

Almost surely, 2^71809325 is an apocalyptic number.

It is an amenable number.

71809325 is a deficient number, since it is larger than the sum of its proper divisors (29954995).

71809325 is a wasteful number, since it uses less digits than its factorization.

71809325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410356 (or 410351 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 71809325 is about 8474.0382935174. The cubic root of 71809325 is about 415.6491992242.

The spelling of 71809325 in words is "seventy-one million, eight hundred nine thousand, three hundred twenty-five".