137803997 has 2 divisors, whose sum is σ = 137803998. Its totient is φ = 137803996.

The previous prime is 137803957. The next prime is 137804003. The reversal of 137803997 is 799308731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116079076 + 21724921 = 10774^2 + 4661^2 .

It is a cyclic number.

It is not a de Polignac number, because 137803997 - 2⁶ = 137803933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137803927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68901998 + 68901999.

It is an arithmetic number, because the mean of its divisors is an integer number (68901999).

Almost surely, 2^137803997 is an apocalyptic number.

It is an amenable number.

137803997 is a deficient number, since it is larger than the sum of its proper divisors (1).

137803997 is an equidigital number, since it uses as much as digits as its factorization.

137803997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 137803997 is about 11738.9947184586. The cubic root of 137803997 is about 516.5201535775.

The spelling of 137803997 in words is "one hundred thirty-seven million, eight hundred three thousand, nine hundred ninety-seven".