137889487 has 2 divisors, whose sum is σ = 137889488. Its totient is φ = 137889486.

The previous prime is 137889467. The next prime is 137889497. The reversal of 137889487 is 784988731.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137889487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137889467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68944743 + 68944744.

It is an arithmetic number, because the mean of its divisors is an integer number (68944744).

Almost surely, 2^137889487 is an apocalyptic number.

137889487 is a deficient number, since it is larger than the sum of its proper divisors (1).

137889487 is an equidigital number, since it uses as much as digits as its factorization.

137889487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2709504, while the sum is 55.

The square root of 137889487 is about 11742.6354367323. The cubic root of 137889487 is about 516.6269433676.

The spelling of 137889487 in words is "one hundred thirty-seven million, eight hundred eighty-nine thousand, four hundred eighty-seven".