74072387 has 4 divisors (see below), whose sum is σ = 74169480. Its totient is φ = 73975296.

The previous prime is 74072371. The next prime is 74072407. The reversal of 74072387 is 78327047.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78327047 = 751 ⋅104297.

It is a cyclic number.

It is not a de Polignac number, because 74072387 - 2⁴ = 74072371 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74072387.

It is not an unprimeable number, because it can be changed into a prime (74072357) 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, 47393 + ... + 48930.

It is an arithmetic number, because the mean of its divisors is an integer number (18542370).

Almost surely, 2^74072387 is an apocalyptic number.

74072387 is a deficient number, since it is larger than the sum of its proper divisors (97093).

74072387 is an equidigital number, since it uses as much as digits as its factorization.

74072387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97092.

The product of its (nonzero) digits is 65856, while the sum is 38.

The square root of 74072387 is about 8606.5316475337. The cubic root of 74072387 is about 419.9704949039.

The spelling of 74072387 in words is "seventy-four million, seventy-two thousand, three hundred eighty-seven".