137442493 has 2 divisors, whose sum is σ = 137442494. Its totient is φ = 137442492.

The previous prime is 137442469. The next prime is 137442521. The reversal of 137442493 is 394244731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119311929 + 18130564 = 10923^2 + 4258^2 .

It is a cyclic number.

It is not a de Polignac number, because 137442493 - 2⁹ = 137441981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137442413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68721246 + 68721247.

It is an arithmetic number, because the mean of its divisors is an integer number (68721247).

Almost surely, 2^137442493 is an apocalyptic number.

It is an amenable number.

137442493 is a deficient number, since it is larger than the sum of its proper divisors (1).

137442493 is an equidigital number, since it uses as much as digits as its factorization.

137442493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 37.

The square root of 137442493 is about 11723.5870363980. The cubic root of 137442493 is about 516.0680921398.

The spelling of 137442493 in words is "one hundred thirty-seven million, four hundred forty-two thousand, four hundred ninety-three".