74140279 has 4 divisors (see below), whose sum is σ = 74528640. Its totient is φ = 73751920.

The previous prime is 74140273. The next prime is 74140303. The reversal of 74140279 is 97204147.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97204147 = 17 ⋅5717891.

It is a cyclic number.

It is not a de Polignac number, because 74140279 - 2³ = 74140271 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 (74140271) 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, 193894 + ... + 194275.

It is an arithmetic number, because the mean of its divisors is an integer number (18632160).

Almost surely, 2^74140279 is an apocalyptic number.

74140279 is a deficient number, since it is larger than the sum of its proper divisors (388361).

74140279 is a wasteful number, since it uses less digits than its factorization.

74140279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388360.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 74140279 is about 8610.4749578638. The cubic root of 74140279 is about 420.0987655106.

The spelling of 74140279 in words is "seventy-four million, one hundred forty thousand, two hundred seventy-nine".