71904497 has 4 divisors (see below), whose sum is σ = 82176576. Its totient is φ = 61632420.

The previous prime is 71904487. The next prime is 71904523. The reversal of 71904497 is 79440917.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71904497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71904487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5136029 + ... + 5136042.

It is an arithmetic number, because the mean of its divisors is an integer number (20544144).

Almost surely, 2^71904497 is an apocalyptic number.

It is an amenable number.

71904497 is a deficient number, since it is larger than the sum of its proper divisors (10272079).

71904497 is a wasteful number, since it uses less digits than its factorization.

71904497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10272078.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 71904497 is about 8479.6519386116. The cubic root of 71904497 is about 415.8327441068.

The spelling of 71904497 in words is "seventy-one million, nine hundred four thousand, four hundred ninety-seven".