74571149 has 2 divisors, whose sum is σ = 74571150. Its totient is φ = 74571148.

The previous prime is 74571139. The next prime is 74571157. The reversal of 74571149 is 94117547.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74476900 + 94249 = 8630^2 + 307^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74571149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74571109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37285574 + 37285575.

It is an arithmetic number, because the mean of its divisors is an integer number (37285575).

Almost surely, 2^74571149 is an apocalyptic number.

It is an amenable number.

74571149 is a deficient number, since it is larger than the sum of its proper divisors (1).

74571149 is an equidigital number, since it uses as much as digits as its factorization.

74571149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 38.

The square root of 74571149 is about 8635.4588181520. The cubic root of 74571149 is about 420.9110025277.

The spelling of 74571149 in words is "seventy-four million, five hundred seventy-one thousand, one hundred forty-nine".