69967421 has 2 divisors, whose sum is σ = 69967422. Its totient is φ = 69967420.

The previous prime is 69967411. The next prime is 69967433. The reversal of 69967421 is 12476996.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63520900 + 6446521 = 7970^2 + 2539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69967421 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69967411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34983710 + 34983711.

It is an arithmetic number, because the mean of its divisors is an integer number (34983711).

Almost surely, 2^69967421 is an apocalyptic number.

It is an amenable number.

69967421 is a deficient number, since it is larger than the sum of its proper divisors (1).

69967421 is an equidigital number, since it uses as much as digits as its factorization.

69967421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 44.

The square root of 69967421 is about 8364.6530711082. The cubic root of 69967421 is about 412.0645832241.

The spelling of 69967421 in words is "sixty-nine million, nine hundred sixty-seven thousand, four hundred twenty-one".