74986871 has 2 divisors, whose sum is σ = 74986872. Its totient is φ = 74986870.

The previous prime is 74986867. The next prime is 74986897. The reversal of 74986871 is 17868947.

It is a weak prime.

It is an emirp because it is prime and its reverse (17868947) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74986871 - 2² = 74986867 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74986271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37493435 + 37493436.

It is an arithmetic number, because the mean of its divisors is an integer number (37493436).

Almost surely, 2^74986871 is an apocalyptic number.

74986871 is a deficient number, since it is larger than the sum of its proper divisors (1).

74986871 is an equidigital number, since it uses as much as digits as its factorization.

74986871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 50.

The square root of 74986871 is about 8659.4960015003. The cubic root of 74986871 is about 421.6917235983.

It can be divided in two parts, 74986 and 871, that added together give a palindrome (75857).

The spelling of 74986871 in words is "seventy-four million, nine hundred eighty-six thousand, eight hundred seventy-one".