74279897 has 4 divisors (see below), whose sum is σ = 74426340. Its totient is φ = 74133456.

The previous prime is 74279837. The next prime is 74279917. The reversal of 74279897 is 79897247.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79897247 = 383 ⋅208609.

It can be written as a sum of positive squares in 2 ways, for example, as 70375321 + 3904576 = 8389^2 + 1976^2 .

It is a cyclic number.

It is not a de Polignac number, because 74279897 - 2⁸ = 74279641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74279827) 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, 72458 + ... + 73475.

It is an arithmetic number, because the mean of its divisors is an integer number (18606585).

Almost surely, 2^74279897 is an apocalyptic number.

It is an amenable number.

74279897 is a deficient number, since it is larger than the sum of its proper divisors (146443).

74279897 is a wasteful number, since it uses less digits than its factorization.

74279897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146442.

The product of its digits is 1778112, while the sum is 53.

The square root of 74279897 is about 8618.5785951049. The cubic root of 74279897 is about 420.3623045334.

The spelling of 74279897 in words is "seventy-four million, two hundred seventy-nine thousand, eight hundred ninety-seven".