67772149 has 4 divisors (see below), whose sum is σ = 71758764. Its totient is φ = 63785536.

The previous prime is 67772147. The next prime is 67772161. The reversal of 67772149 is 94127776.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46335249 + 21436900 = 6807^2 + 4630^2 .

It is a cyclic number.

It is not a de Polignac number, because 67772149 - 2¹ = 67772147 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67772147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1993282 + ... + 1993315.

It is an arithmetic number, because the mean of its divisors is an integer number (17939691).

Almost surely, 2^67772149 is an apocalyptic number.

It is an amenable number.

67772149 is a deficient number, since it is larger than the sum of its proper divisors (3986615).

67772149 is a wasteful number, since it uses less digits than its factorization.

67772149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3986614.

The product of its digits is 148176, while the sum is 43.

The square root of 67772149 is about 8232.3841625619. The cubic root of 67772149 is about 407.7091131930.

The spelling of 67772149 in words is "sixty-seven million, seven hundred seventy-two thousand, one hundred forty-nine".