79241621 has 2 divisors, whose sum is σ = 79241622. Its totient is φ = 79241620.

The previous prime is 79241593. The next prime is 79241633. The reversal of 79241621 is 12614297.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53129521 + 26112100 = 7289^2 + 5110^2 .

It is an emirp because it is prime and its reverse (12614297) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79241621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79241221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39620810 + 39620811.

It is an arithmetic number, because the mean of its divisors is an integer number (39620811).

Almost surely, 2^79241621 is an apocalyptic number.

It is an amenable number.

79241621 is a deficient number, since it is larger than the sum of its proper divisors (1).

79241621 is an equidigital number, since it uses as much as digits as its factorization.

79241621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The square root of 79241621 is about 8901.7762834167. The cubic root of 79241621 is about 429.5210477555.

The spelling of 79241621 in words is "seventy-nine million, two hundred forty-one thousand, six hundred twenty-one".