75147139 has 2 divisors, whose sum is σ = 75147140. Its totient is φ = 75147138.

The previous prime is 75147119. The next prime is 75147143. The reversal of 75147139 is 93174157.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 75147139 - 2¹⁵ = 75114371 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 75147098 and 75147107.

It is not a weakly prime, because it can be changed into another prime (75147119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37573569 + 37573570.

It is an arithmetic number, because the mean of its divisors is an integer number (37573570).

Almost surely, 2^75147139 is an apocalyptic number.

75147139 is a deficient number, since it is larger than the sum of its proper divisors (1).

75147139 is an equidigital number, since it uses as much as digits as its factorization.

75147139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26460, while the sum is 37.

The square root of 75147139 is about 8668.7449495299. The cubic root of 75147139 is about 421.9919343636.

The spelling of 75147139 in words is "seventy-five million, one hundred forty-seven thousand, one hundred thirty-nine".