75381139 has 2 divisors, whose sum is σ = 75381140. Its totient is φ = 75381138.

The previous prime is 75381133. The next prime is 75381149. The reversal of 75381139 is 93118357.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (93118357) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75381139 - 2¹⁷ = 75250067 is a prime.

It is a super-2 number, since 2×75381139² = 11364632233874642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 75381098 and 75381107.

It is not a weakly prime, because it can be changed into another prime (75381133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37690569 + 37690570.

It is an arithmetic number, because the mean of its divisors is an integer number (37690570).

Almost surely, 2^75381139 is an apocalyptic number.

75381139 is a deficient number, since it is larger than the sum of its proper divisors (1).

75381139 is an equidigital number, since it uses as much as digits as its factorization.

75381139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 37.

The square root of 75381139 is about 8682.2312224451. The cubic root of 75381139 is about 422.4294928035.

The spelling of 75381139 in words is "seventy-five million, three hundred eighty-one thousand, one hundred thirty-nine".