75663139 has 2 divisors, whose sum is σ = 75663140. Its totient is φ = 75663138.

The previous prime is 75663131. The next prime is 75663173. The reversal of 75663139 is 93136657.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 75663139 - 2³ = 75663131 is a prime.

It is not a weakly prime, because it can be changed into another prime (75663131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37831569 + 37831570.

It is an arithmetic number, because the mean of its divisors is an integer number (37831570).

Almost surely, 2^75663139 is an apocalyptic number.

75663139 is a deficient number, since it is larger than the sum of its proper divisors (1).

75663139 is an equidigital number, since it uses as much as digits as its factorization.

75663139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102060, while the sum is 40.

The square root of 75663139 is about 8698.4561273826. The cubic root of 75663139 is about 422.9556052941.

The spelling of 75663139 in words is "seventy-five million, six hundred sixty-three thousand, one hundred thirty-nine".