72149983 has 2 divisors, whose sum is σ = 72149984. Its totient is φ = 72149982.

The previous prime is 72149981. The next prime is 72150047. The reversal of 72149983 is 38994127.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72149983 - 2¹ = 72149981 is a prime.

Together with 72149981, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72149981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36074991 + 36074992.

It is an arithmetic number, because the mean of its divisors is an integer number (36074992).

Almost surely, 2^72149983 is an apocalyptic number.

72149983 is a deficient number, since it is larger than the sum of its proper divisors (1).

72149983 is an equidigital number, since it uses as much as digits as its factorization.

72149983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 43.

The square root of 72149983 is about 8494.1146095399. The cubic root of 72149983 is about 416.3054320512.

The spelling of 72149983 in words is "seventy-two million, one hundred forty-nine thousand, nine hundred eighty-three".