75928621 has 4 divisors (see below), whose sum is σ = 77061952. Its totient is φ = 74795292.

The previous prime is 75928553. The next prime is 75928639. The reversal of 75928621 is 12682957.

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: 12682957 = 7 ⋅1811851.

It is a cyclic number.

It is not a de Polignac number, because 75928621 - 2⁷ = 75928493 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 (75929621) 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, 566565 + ... + 566698.

It is an arithmetic number, because the mean of its divisors is an integer number (19265488).

Almost surely, 2^75928621 is an apocalyptic number.

It is an amenable number.

75928621 is a deficient number, since it is larger than the sum of its proper divisors (1133331).

75928621 is a wasteful number, since it uses less digits than its factorization.

75928621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133330.

The product of its digits is 60480, while the sum is 40.

The square root of 75928621 is about 8713.7030589756. The cubic root of 75928621 is about 423.4497077430.

The spelling of 75928621 in words is "seventy-five million, nine hundred twenty-eight thousand, six hundred twenty-one".