75896021 has 4 divisors (see below), whose sum is σ = 79195872. Its totient is φ = 72596172.

The previous prime is 75896003. The next prime is 75896047. The reversal of 75896021 is 12069857.

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: 12069857 = 79 ⋅152783.

It is a cyclic number.

It is not a de Polignac number, because 75896021 - 2⁶ = 75895957 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 (75896071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1649891 + ... + 1649936.

It is an arithmetic number, because the mean of its divisors is an integer number (19798968).

Almost surely, 2^75896021 is an apocalyptic number.

It is an amenable number.

75896021 is a deficient number, since it is larger than the sum of its proper divisors (3299851).

75896021 is a wasteful number, since it uses less digits than its factorization.

75896021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3299850.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 75896021 is about 8711.8322412682. The cubic root of 75896021 is about 423.3890962704.

The spelling of 75896021 in words is "seventy-five million, eight hundred ninety-six thousand, twenty-one".