137304421 has 2 divisors, whose sum is σ = 137304422. Its totient is φ = 137304420.

The previous prime is 137304407. The next prime is 137304439. The reversal of 137304421 is 124403731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121859521 + 15444900 = 11039^2 + 3930^2 .

It is a cyclic number.

It is not a de Polignac number, because 137304421 - 2⁵ = 137304389 is a prime.

It is a super-2 number, since 2×137304421² = 37705008052290482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137304481) 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, 68652210 + 68652211.

It is an arithmetic number, because the mean of its divisors is an integer number (68652211).

Almost surely, 2^137304421 is an apocalyptic number.

It is an amenable number.

137304421 is a deficient number, since it is larger than the sum of its proper divisors (1).

137304421 is an equidigital number, since it uses as much as digits as its factorization.

137304421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 137304421 is about 11717.6969153499. The cubic root of 137304421 is about 515.8952236533.

The spelling of 137304421 in words is "one hundred thirty-seven million, three hundred four thousand, four hundred twenty-one".