74087509 has 4 divisors (see below), whose sum is σ = 74208204. Its totient is φ = 73966816.

The previous prime is 74087473. The next prime is 74087527. The reversal of 74087509 is 90578047.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39312900 + 34774609 = 6270^2 + 5897^2 .

It is a cyclic number.

It is not a de Polignac number, because 74087509 - 2⁷ = 74087381 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 (74087569) 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, 59422 + ... + 60655.

It is an arithmetic number, because the mean of its divisors is an integer number (18552051).

Almost surely, 2^74087509 is an apocalyptic number.

It is an amenable number.

74087509 is a deficient number, since it is larger than the sum of its proper divisors (120695).

74087509 is a wasteful number, since it uses less digits than its factorization.

74087509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120694.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 74087509 is about 8607.4101215174. The cubic root of 74087509 is about 419.9990721824. Note that the first 3 decimals are identical.

The spelling of 74087509 in words is "seventy-four million, eighty-seven thousand, five hundred nine".