137984491 has 2 divisors, whose sum is σ = 137984492. Its totient is φ = 137984490.

The previous prime is 137984471. The next prime is 137984519. The reversal of 137984491 is 194489731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 137984491 - 2⁵ = 137984459 is a prime.

It is not a weakly prime, because it can be changed into another prime (137984471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68992245 + 68992246.

It is an arithmetic number, because the mean of its divisors is an integer number (68992246).

Almost surely, 2^137984491 is an apocalyptic number.

137984491 is a deficient number, since it is larger than the sum of its proper divisors (1).

137984491 is an equidigital number, since it uses as much as digits as its factorization.

137984491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 46.

The square root of 137984491 is about 11746.6799990465. The cubic root of 137984491 is about 516.7455657980.

The spelling of 137984491 in words is "one hundred thirty-seven million, nine hundred eighty-four thousand, four hundred ninety-one".