72188747 has 2 divisors, whose sum is σ = 72188748. Its totient is φ = 72188746.

The previous prime is 72188723. The next prime is 72188761. The reversal of 72188747 is 74788127.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72188747 - 2¹⁴ = 72172363 is a prime.

It is a super-2 number, since 2×72188747² = 10422430386860018, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 72188698 and 72188707.

It is not a weakly prime, because it can be changed into another prime (72188717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36094373 + 36094374.

It is an arithmetic number, because the mean of its divisors is an integer number (36094374).

Almost surely, 2^72188747 is an apocalyptic number.

72188747 is a deficient number, since it is larger than the sum of its proper divisors (1).

72188747 is an equidigital number, since it uses as much as digits as its factorization.

72188747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 175616, while the sum is 44.

The square root of 72188747 is about 8496.3961183551. The cubic root of 72188747 is about 416.3799748017.

The spelling of 72188747 in words is "seventy-two million, one hundred eighty-eight thousand, seven hundred forty-seven".