72507751 has 2 divisors, whose sum is σ = 72507752. Its totient is φ = 72507750.

The previous prime is 72507733. The next prime is 72507769. The reversal of 72507751 is 15770527.

It is a balanced prime because it is at equal distance from previous prime (72507733) and next prime (72507769).

It is a cyclic number.

It is not a de Polignac number, because 72507751 - 2¹⁷ = 72376679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72507251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36253875 + 36253876.

It is an arithmetic number, because the mean of its divisors is an integer number (36253876).

Almost surely, 2^72507751 is an apocalyptic number.

72507751 is a deficient number, since it is larger than the sum of its proper divisors (1).

72507751 is an equidigital number, since it uses as much as digits as its factorization.

72507751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17150, while the sum is 34.

The square root of 72507751 is about 8515.1483251908. The cubic root of 72507751 is about 416.9924049783.

The spelling of 72507751 in words is "seventy-two million, five hundred seven thousand, seven hundred fifty-one".