67472621 has 2 divisors, whose sum is σ = 67472622. Its totient is φ = 67472620.

The previous prime is 67472617. The next prime is 67472623. The reversal of 67472621 is 12627476.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47803396 + 19669225 = 6914^2 + 4435^2 .

It is a cyclic number.

It is not a de Polignac number, because 67472621 - 2² = 67472617 is a prime.

Together with 67472623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67472623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33736310 + 33736311.

It is an arithmetic number, because the mean of its divisors is an integer number (33736311).

Almost surely, 2^67472621 is an apocalyptic number.

It is an amenable number.

67472621 is a deficient number, since it is larger than the sum of its proper divisors (1).

67472621 is an equidigital number, since it uses as much as digits as its factorization.

67472621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 35.

The square root of 67472621 is about 8214.1719607030. The cubic root of 67472621 is about 407.1075846445.

The spelling of 67472621 in words is "sixty-seven million, four hundred seventy-two thousand, six hundred twenty-one".