75138737 has 2 divisors, whose sum is σ = 75138738. Its totient is φ = 75138736.

The previous prime is 75138733. The next prime is 75138757. The reversal of 75138737 is 73783157.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50922496 + 24216241 = 7136^2 + 4921^2 .

It is a cyclic number.

It is not a de Polignac number, because 75138737 - 2² = 75138733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 75138694 and 75138703.

It is not a weakly prime, because it can be changed into another prime (75138731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37569368 + 37569369.

It is an arithmetic number, because the mean of its divisors is an integer number (37569369).

Almost surely, 2^75138737 is an apocalyptic number.

It is an amenable number.

75138737 is a deficient number, since it is larger than the sum of its proper divisors (1).

75138737 is an equidigital number, since it uses as much as digits as its factorization.

75138737 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 123480, while the sum is 41.

The square root of 75138737 is about 8668.2603214255. The cubic root of 75138737 is about 421.9762065155.

The spelling of 75138737 in words is "seventy-five million, one hundred thirty-eight thousand, seven hundred thirty-seven".