74396989 has 4 divisors (see below), whose sum is σ = 78312640. Its totient is φ = 70481340.

The previous prime is 74396957. The next prime is 74396999. The reversal of 74396989 is 98969347.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98969347 = 19 ⋅5208913.

It is a cyclic number.

It is not a de Polignac number, because 74396989 - 2⁵ = 74396957 is a prime.

It is a super-2 number, since 2×74396989² = 11069823944532242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74396909) 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, 1957797 + ... + 1957834.

It is an arithmetic number, because the mean of its divisors is an integer number (19578160).

Almost surely, 2^74396989 is an apocalyptic number.

It is an amenable number.

74396989 is a deficient number, since it is larger than the sum of its proper divisors (3915651).

74396989 is a wasteful number, since it uses less digits than its factorization.

74396989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3915650.

The product of its digits is 2939328, while the sum is 55.

The square root of 74396989 is about 8625.3689196463. The cubic root of 74396989 is about 420.5830696133.

The spelling of 74396989 in words is "seventy-four million, three hundred ninety-six thousand, nine hundred eighty-nine".