74443531 has 2 divisors, whose sum is σ = 74443532. Its totient is φ = 74443530.

The previous prime is 74443511. The next prime is 74443541. The reversal of 74443531 is 13534447.

It is a strong prime.

It is an emirp because it is prime and its reverse (13534447) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74443531 - 2¹¹ = 74441483 is a prime.

It is a super-2 number, since 2×74443531² = 11083678615495922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 74443493 and 74443502.

It is not a weakly prime, because it can be changed into another prime (74443511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37221765 + 37221766.

It is an arithmetic number, because the mean of its divisors is an integer number (37221766).

Almost surely, 2^74443531 is an apocalyptic number.

74443531 is a deficient number, since it is larger than the sum of its proper divisors (1).

74443531 is an equidigital number, since it uses as much as digits as its factorization.

74443531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 31.

The square root of 74443531 is about 8628.0664693777. The cubic root of 74443531 is about 420.6707554949.

Adding to 74443531 its reverse (13534447), we get a palindrome (87977978).

The spelling of 74443531 in words is "seventy-four million, four hundred forty-three thousand, five hundred thirty-one".