74261881 has 2 divisors, whose sum is σ = 74261882. Its totient is φ = 74261880.

The previous prime is 74261821. The next prime is 74261893. The reversal of 74261881 is 18816247.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69889600 + 4372281 = 8360^2 + 2091^2 .

It is an emirp because it is prime and its reverse (18816247) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74261881 - 2⁷ = 74261753 is a prime.

It is a super-2 number, since 2×74261881² = 11029653939316322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74261881.

It is not a weakly prime, because it can be changed into another prime (74261801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37130940 + 37130941.

It is an arithmetic number, because the mean of its divisors is an integer number (37130941).

Almost surely, 2^74261881 is an apocalyptic number.

It is an amenable number.

74261881 is a deficient number, since it is larger than the sum of its proper divisors (1).

74261881 is an equidigital number, since it uses as much as digits as its factorization.

74261881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21504, while the sum is 37.

The square root of 74261881 is about 8617.5333477742. The cubic root of 74261881 is about 420.3283166042.

The spelling of 74261881 in words is "seventy-four million, two hundred sixty-one thousand, eight hundred eighty-one".