72150889 has 2 divisors, whose sum is σ = 72150890. Its totient is φ = 72150888.

The previous prime is 72150887. The next prime is 72150899. The reversal of 72150889 is 98805127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47499664 + 24651225 = 6892^2 + 4965^2 .

It is a cyclic number.

It is not a de Polignac number, because 72150889 - 2¹ = 72150887 is a prime.

Together with 72150887, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72150887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36075444 + 36075445.

It is an arithmetic number, because the mean of its divisors is an integer number (36075445).

Almost surely, 2^72150889 is an apocalyptic number.

It is an amenable number.

72150889 is a deficient number, since it is larger than the sum of its proper divisors (1).

72150889 is an equidigital number, since it uses as much as digits as its factorization.

72150889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 72150889 is about 8494.1679404165. The cubic root of 72150889 is about 416.3071745840.

The spelling of 72150889 in words is "seventy-two million, one hundred fifty thousand, eight hundred eighty-nine".