72750131 has 2 divisors, whose sum is σ = 72750132. Its totient is φ = 72750130.

The previous prime is 72750101. The next prime is 72750137. The reversal of 72750131 is 13105727.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72750131 - 2¹⁴ = 72733747 is a prime.

It is a super-2 number, since 2×72750131² = 10585163121034322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72750131.

It is not a weakly prime, because it can be changed into another prime (72750137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36375065 + 36375066.

It is an arithmetic number, because the mean of its divisors is an integer number (36375066).

Almost surely, 2^72750131 is an apocalyptic number.

72750131 is a deficient number, since it is larger than the sum of its proper divisors (1).

72750131 is an equidigital number, since it uses as much as digits as its factorization.

72750131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1470, while the sum is 26.

The square root of 72750131 is about 8529.3687339685. The cubic root of 72750131 is about 417.4565310259.

Adding to 72750131 its reverse (13105727), we get a palindrome (85855858).

The spelling of 72750131 in words is "seventy-two million, seven hundred fifty thousand, one hundred thirty-one".