137403109 has 2 divisors, whose sum is σ = 137403110. Its totient is φ = 137403108.

The previous prime is 137403053. The next prime is 137403139. The reversal of 137403109 is 901304731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113422500 + 23980609 = 10650^2 + 4897^2 .

It is an emirp because it is prime and its reverse (901304731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137403109 - 2⁷ = 137402981 is a prime.

It is a super-2 number, since 2×137403109² = 37759228725731762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137403139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68701554 + 68701555.

It is an arithmetic number, because the mean of its divisors is an integer number (68701555).

Almost surely, 2^137403109 is an apocalyptic number.

It is an amenable number.

137403109 is a deficient number, since it is larger than the sum of its proper divisors (1).

137403109 is an equidigital number, since it uses as much as digits as its factorization.

137403109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 137403109 is about 11721.9072253623. The cubic root of 137403109 is about 516.0187945100.

The spelling of 137403109 in words is "one hundred thirty-seven million, four hundred three thousand, one hundred nine".