67400397989 has 2 divisors, whose sum is σ = 67400397990. Its totient is φ = 67400397988.

The previous prime is 67400397983. The next prime is 67400398061. The reversal of 67400397989 is 98979300476.

67400397989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64176088900 + 3224309089 = 253330^2 + 56783^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67400397989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67400397983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33700198994 + 33700198995.

It is an arithmetic number, because the mean of its divisors is an integer number (33700198995).

Almost surely, 2^67400397989 is an apocalyptic number.

It is an amenable number.

67400397989 is a deficient number, since it is larger than the sum of its proper divisors (1).

67400397989 is an equidigital number, since it uses as much as digits as its factorization.

67400397989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20575296, while the sum is 62.

The spelling of 67400397989 in words is "sixty-seven billion, four hundred million, three hundred ninety-seven thousand, nine hundred eighty-nine".