74236147 has 4 divisors (see below), whose sum is σ = 74770360. Its totient is φ = 73701936.

The previous prime is 74236091. The next prime is 74236153. The reversal of 74236147 is 74163247.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74163247 = 23 ⋅3224489.

It is a cyclic number.

It is not a de Polignac number, because 74236147 - 2²³ = 65847539 is a prime.

It is a super-2 number, since 2×74236147² = 11022011042811218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74236187) 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, 266898 + ... + 267175.

It is an arithmetic number, because the mean of its divisors is an integer number (18692590).

Almost surely, 2^74236147 is an apocalyptic number.

74236147 is a deficient number, since it is larger than the sum of its proper divisors (534213).

74236147 is a wasteful number, since it uses less digits than its factorization.

74236147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534212.

The product of its digits is 28224, while the sum is 34.

The square root of 74236147 is about 8616.0400997210. The cubic root of 74236147 is about 420.2797588137.

Subtracting from 74236147 its reverse (74163247), we obtain a square (72900 = 270²).

The spelling of 74236147 in words is "seventy-four million, two hundred thirty-six thousand, one hundred forty-seven".