77241621 has 8 divisors (see below), whose sum is σ = 103035520. Its totient is φ = 51471072.

The previous prime is 77241601. The next prime is 77241641. The reversal of 77241621 is 12614277.

It is an interprime number because it is at equal distance from previous prime (77241601) and next prime (77241641).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77241621 - 2⁵ = 77241589 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 (77241601) 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, 4500 + ... + 13218.

It is an arithmetic number, because the mean of its divisors is an integer number (12879440).

Almost surely, 2^77241621 is an apocalyptic number.

It is an amenable number.

77241621 is a deficient number, since it is larger than the sum of its proper divisors (25793899).

77241621 is a wasteful number, since it uses less digits than its factorization.

77241621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11675.

The product of its digits is 4704, while the sum is 30.

The square root of 77241621 is about 8788.7212380414. The cubic root of 77241621 is about 425.8766146224.

Adding to 77241621 its reverse (12614277), we get a palindrome (89855898).

The spelling of 77241621 in words is "seventy-seven million, two hundred forty-one thousand, six hundred twenty-one".