75497821 has 8 divisors (see below), whose sum is σ = 86362880. Its totient is φ = 64652688.

The previous prime is 75497819. The next prime is 75497827. The reversal of 75497821 is 12879457.

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

It is a cyclic number.

It is not a de Polignac number, because 75497821 - 2¹ = 75497819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75497827) 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, 4300 + ... + 13018.

It is an arithmetic number, because the mean of its divisors is an integer number (10795360).

Almost surely, 2^75497821 is an apocalyptic number.

It is an amenable number.

75497821 is a deficient number, since it is larger than the sum of its proper divisors (10865059).

75497821 is a wasteful number, since it uses less digits than its factorization.

75497821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9963.

The product of its digits is 141120, while the sum is 43.

The square root of 75497821 is about 8688.9482102266. The cubic root of 75497821 is about 422.6473391098.

The spelling of 75497821 in words is "seventy-five million, four hundred ninety-seven thousand, eight hundred twenty-one".