77230621 has 8 divisors (see below), whose sum is σ = 83541024. Its totient is φ = 70973040.

The previous prime is 77230613. The next prime is 77230631. The reversal of 77230621 is 12603277.

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 77230621 - 2³ = 77230613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77230621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77230631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10135 + ... + 16036.

It is an arithmetic number, because the mean of its divisors is an integer number (10442628).

Almost surely, 2^77230621 is an apocalyptic number.

It is an amenable number.

77230621 is a deficient number, since it is larger than the sum of its proper divisors (6310403).

77230621 is a wasteful number, since it uses less digits than its factorization.

77230621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26411.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 77230621 is about 8788.0954136832. The cubic root of 77230621 is about 425.8563972617.

Adding to 77230621 its reverse (12603277), we get a palindrome (89833898).

The spelling of 77230621 in words is "seventy-seven million, two hundred thirty thousand, six hundred twenty-one".