74071989 has 24 divisors (see below), whose sum is σ = 114546432. Its totient is φ = 47783520.

The previous prime is 74071973. The next prime is 74071997. The reversal of 74071989 is 98917047.

It is not a de Polignac number, because 74071989 - 2⁴ = 74071973 is a prime.

It is a super-2 number, since 2×74071989² = 10973319108832242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74071919) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2617 + ... + 12449.

It is an arithmetic number, because the mean of its divisors is an integer number (4772768).

Almost surely, 2^74071989 is an apocalyptic number.

It is an amenable number.

74071989 is a deficient number, since it is larger than the sum of its proper divisors (40474443).

74071989 is an equidigital number, since it uses as much as digits as its factorization.

74071989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9879 (or 9867 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 74071989 is about 8606.5085255288. The cubic root of 74071989 is about 419.9697427182.

The spelling of 74071989 in words is "seventy-four million, seventy-one thousand, nine hundred eighty-nine".