73974389 has 8 divisors (see below), whose sum is σ = 76755000. Its totient is φ = 71209152.

The previous prime is 73974367. The next prime is 73974419. The reversal of 73974389 is 98347937.

It can be written as a sum of positive squares in 4 ways, for example, as 16851025 + 57123364 = 4105^2 + 7558^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 73974389 - 2¹² = 73970293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73974349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6467 + ... + 13775.

It is an arithmetic number, because the mean of its divisors is an integer number (9594375).

Almost surely, 2^73974389 is an apocalyptic number.

It is an amenable number.

73974389 is a deficient number, since it is larger than the sum of its proper divisors (2780611).

73974389 is a wasteful number, since it uses less digits than its factorization.

73974389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7687.

The product of its digits is 1143072, while the sum is 50.

The square root of 73974389 is about 8600.8365290825. The cubic root of 73974389 is about 419.7852057404.

The spelling of 73974389 in words is "seventy-three million, nine hundred seventy-four thousand, three hundred eighty-nine".