74150981 has 2 divisors, whose sum is σ = 74150982. Its totient is φ = 74150980.

The previous prime is 74150969. The next prime is 74150987. The reversal of 74150981 is 18905147.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74114881 + 36100 = 8609^2 + 190^2 .

It is an emirp because it is prime and its reverse (18905147) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74150981 - 2⁶ = 74150917 is a prime.

It is a super-2 number, since 2×74150981² = 10996735966524722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74150987) 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 as a sum of consecutive naturals, namely, 37075490 + 37075491.

It is an arithmetic number, because the mean of its divisors is an integer number (37075491).

Almost surely, 2^74150981 is an apocalyptic number.

It is an amenable number.

74150981 is a deficient number, since it is larger than the sum of its proper divisors (1).

74150981 is an equidigital number, since it uses as much as digits as its factorization.

74150981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 74150981 is about 8611.0963878010. The cubic root of 74150981 is about 420.1189780084.

The spelling of 74150981 in words is "seventy-four million, one hundred fifty thousand, nine hundred eighty-one".