137972273 has 2 divisors, whose sum is σ = 137972274. Its totient is φ = 137972272.

The previous prime is 137972269. The next prime is 137972279. The reversal of 137972273 is 372279731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122036209 + 15936064 = 11047^2 + 3992^2 .

It is a cyclic number.

It is not a de Polignac number, because 137972273 - 2² = 137972269 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 137972273.

It is not a weakly prime, because it can be changed into another prime (137972279) 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, 68986136 + 68986137.

It is an arithmetic number, because the mean of its divisors is an integer number (68986137).

Almost surely, 2^137972273 is an apocalyptic number.

It is an amenable number.

137972273 is a deficient number, since it is larger than the sum of its proper divisors (1).

137972273 is an equidigital number, since it uses as much as digits as its factorization.

137972273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 111132, while the sum is 41.

The square root of 137972273 is about 11746.1599256949. The cubic root of 137972273 is about 516.7303133987.

The spelling of 137972273 in words is "one hundred thirty-seven million, nine hundred seventy-two thousand, two hundred seventy-three".