137983121 has 2 divisors, whose sum is σ = 137983122. Its totient is φ = 137983120.

The previous prime is 137983099. The next prime is 137983127. The reversal of 137983121 is 121389731.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133656721 + 4326400 = 11561^2 + 2080^2 .

It is a cyclic number.

It is not a de Polignac number, because 137983121 - 2²² = 133788817 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (137983127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68991560 + 68991561.

It is an arithmetic number, because the mean of its divisors is an integer number (68991561).

Almost surely, 2^137983121 is an apocalyptic number.

It is an amenable number.

137983121 is a deficient number, since it is larger than the sum of its proper divisors (1).

137983121 is an equidigital number, since it uses as much as digits as its factorization.

137983121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 35.

The square root of 137983121 is about 11746.6216845525. The cubic root of 137983121 is about 516.7438555967.

The spelling of 137983121 in words is "one hundred thirty-seven million, nine hundred eighty-three thousand, one hundred twenty-one".