137803493 has 2 divisors, whose sum is σ = 137803494. Its totient is φ = 137803492.

The previous prime is 137803469. The next prime is 137803499. The reversal of 137803493 is 394308731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133795489 + 4008004 = 11567^2 + 2002^2 .

It is an emirp because it is prime and its reverse (394308731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137803493 - 2¹⁴ = 137787109 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 (137803499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68901746 + 68901747.

It is an arithmetic number, because the mean of its divisors is an integer number (68901747).

Almost surely, 2^137803493 is an apocalyptic number.

It is an amenable number.

137803493 is a deficient number, since it is larger than the sum of its proper divisors (1).

137803493 is an equidigital number, since it uses as much as digits as its factorization.

137803493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 137803493 is about 11738.9732515242. The cubic root of 137803493 is about 516.5195238752.

The spelling of 137803493 in words is "one hundred thirty-seven million, eight hundred three thousand, four hundred ninety-three".