75841921 has 4 divisors (see below), whose sum is σ = 76550832. Its totient is φ = 75133012.

The previous prime is 75841907. The next prime is 75841943. The reversal of 75841921 is 12914857.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12914857 = 509 ⋅25373.

It is a cyclic number.

It is not a de Polignac number, because 75841921 - 2⁵ = 75841889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75841951) 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, 354295 + ... + 354508.

It is an arithmetic number, because the mean of its divisors is an integer number (19137708).

Almost surely, 2^75841921 is an apocalyptic number.

It is an amenable number.

75841921 is a deficient number, since it is larger than the sum of its proper divisors (708911).

75841921 is a wasteful number, since it uses less digits than its factorization.

75841921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708910.

The product of its digits is 20160, while the sum is 37.

The square root of 75841921 is about 8708.7267151978. The cubic root of 75841921 is about 423.2884726610.

The spelling of 75841921 in words is "seventy-five million, eight hundred forty-one thousand, nine hundred twenty-one".