75443139 has 12 divisors (see below), whose sum is σ = 110600776. Its totient is φ = 49544352.

The previous prime is 75443107. The next prime is 75443189. The reversal of 75443139 is 93134457.

It is not a de Polignac number, because 75443139 - 2⁵ = 75443107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75443189) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61954 + ... + 63159.

Almost surely, 2^75443139 is an apocalyptic number.

75443139 is a deficient number, since it is larger than the sum of its proper divisors (35157637).

75443139 is a wasteful number, since it uses less digits than its factorization.

75443139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125186 (or 125183 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 75443139 is about 8685.8009993322. The cubic root of 75443139 is about 422.5452753087.

The spelling of 75443139 in words is "seventy-five million, four hundred forty-three thousand, one hundred thirty-nine".