75817813 has 8 divisors (see below), whose sum is σ = 76416480. Its totient is φ = 75222000.

The previous prime is 75817799. The next prime is 75817817. The reversal of 75817813 is 31871857.

It is a happy number.

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 75817813 - 2¹³ = 75809621 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 (75817817) 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, 94731 + ... + 95527.

It is an arithmetic number, because the mean of its divisors is an integer number (9552060).

Almost surely, 2^75817813 is an apocalyptic number.

It is an amenable number.

75817813 is a deficient number, since it is larger than the sum of its proper divisors (598667).

75817813 is a wasteful number, since it uses less digits than its factorization.

75817813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1427.

The product of its digits is 47040, while the sum is 40.

The square root of 75817813 is about 8707.3424763242. The cubic root of 75817813 is about 423.2436174331.

The spelling of 75817813 in words is "seventy-five million, eight hundred seventeen thousand, eight hundred thirteen".