137949211 has 2 divisors, whose sum is σ = 137949212. Its totient is φ = 137949210.

The previous prime is 137949197. The next prime is 137949233. The reversal of 137949211 is 112949731.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137949211 is a prime.

It is not a weakly prime, because it can be changed into another prime (137949241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68974605 + 68974606.

It is an arithmetic number, because the mean of its divisors is an integer number (68974606).

Almost surely, 2^137949211 is an apocalyptic number.

137949211 is a deficient number, since it is larger than the sum of its proper divisors (1).

137949211 is an equidigital number, since it uses as much as digits as its factorization.

137949211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 37.

The square root of 137949211 is about 11745.1782021390. The cubic root of 137949211 is about 516.7015213855.

It can be divided in two parts, 13794 and 9211, that added together give a triangular number (23005 = T₂₁₄).

The spelling of 137949211 in words is "one hundred thirty-seven million, nine hundred forty-nine thousand, two hundred eleven".