74151149 has 4 divisors (see below), whose sum is σ = 77375136. Its totient is φ = 70927164.

The previous prime is 74151131. The next prime is 74151157. The reversal of 74151149 is 94115147.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94115147 = 7 ⋅13445021.

It is a cyclic number.

It is not a de Polignac number, because 74151149 - 2²⁴ = 57373933 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74151169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1611959 + ... + 1612004.

It is an arithmetic number, because the mean of its divisors is an integer number (19343784).

Almost surely, 2^74151149 is an apocalyptic number.

It is an amenable number.

74151149 is a deficient number, since it is larger than the sum of its proper divisors (3223987).

74151149 is a wasteful number, since it uses less digits than its factorization.

74151149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3223986.

The product of its digits is 5040, while the sum is 32.

The square root of 74151149 is about 8611.1061426509. The cubic root of 74151149 is about 420.1192952887.

The spelling of 74151149 in words is "seventy-four million, one hundred fifty-one thousand, one hundred forty-nine".