72850621 has 2 divisors, whose sum is σ = 72850622. Its totient is φ = 72850620.

The previous prime is 72850619. The next prime is 72850633. The reversal of 72850621 is 12605827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48149721 + 24700900 = 6939^2 + 4970^2 .

It is a cyclic number.

It is not a de Polignac number, because 72850621 - 2¹ = 72850619 is a prime.

Together with 72850619, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_4275805 and since 72850621 and 4275805 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72851621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36425310 + 36425311.

It is an arithmetic number, because the mean of its divisors is an integer number (36425311).

Almost surely, 2^72850621 is an apocalyptic number.

It is an amenable number.

72850621 is a deficient number, since it is larger than the sum of its proper divisors (1).

72850621 is an equidigital number, since it uses as much as digits as its factorization.

72850621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 72850621 is about 8535.2575239415. The cubic root of 72850621 is about 417.6486539620.

The spelling of 72850621 in words is "seventy-two million, eight hundred fifty thousand, six hundred twenty-one".