137661241 has 2 divisors, whose sum is σ = 137661242. Its totient is φ = 137661240.

The previous prime is 137661239. The next prime is 137661287. The reversal of 137661241 is 142166731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129481641 + 8179600 = 11379^2 + 2860^2 .

It is a cyclic number.

It is not a de Polignac number, because 137661241 - 2¹ = 137661239 is a prime.

Together with 137661239, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (137661221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68830620 + 68830621.

It is an arithmetic number, because the mean of its divisors is an integer number (68830621).

Almost surely, 2^137661241 is an apocalyptic number.

It is an amenable number.

137661241 is a deficient number, since it is larger than the sum of its proper divisors (1).

137661241 is an equidigital number, since it uses as much as digits as its factorization.

137661241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 137661241 is about 11732.9127244687. The cubic root of 137661241 is about 516.3417314965.

The spelling of 137661241 in words is "one hundred thirty-seven million, six hundred sixty-one thousand, two hundred forty-one".