75424394 has 4 divisors (see below), whose sum is σ = 113136594. Its totient is φ = 37712196.

The previous prime is 75424369. The next prime is 75424397. The reversal of 75424394 is 49342457.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49342457 = 43 ⋅1147499.

It can be written as a sum of positive squares in only one way, i.e., 72880369 + 2544025 = 8537^2 + 1595^2 .

It is not an unprimeable number, because it can be changed into a prime (75424397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18856097 + ... + 18856100.

Almost surely, 2^75424394 is an apocalyptic number.

75424394 is a deficient number, since it is larger than the sum of its proper divisors (37712200).

75424394 is a wasteful number, since it uses less digits than its factorization.

75424394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37712199.

The product of its digits is 120960, while the sum is 38.

The square root of 75424394 is about 8684.7218723457. The cubic root of 75424394 is about 422.5102764677.

The spelling of 75424394 in words is "seventy-five million, four hundred twenty-four thousand, three hundred ninety-four".