139898487 has 8 divisors (see below), whose sum is σ = 186590704. Its totient is φ = 93235968.

The previous prime is 139898467. The next prime is 139898497. The reversal of 139898487 is 784898931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 139898487 - 2⁷ = 139898359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139898467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8373 + ... + 18705.

It is an arithmetic number, because the mean of its divisors is an integer number (23323838).

Almost surely, 2^139898487 is an apocalyptic number.

139898487 is a deficient number, since it is larger than the sum of its proper divisors (46692217).

139898487 is a wasteful number, since it uses less digits than its factorization.

139898487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14849.

The product of its digits is 3483648, while the sum is 57.

The square root of 139898487 is about 11827.8690811152. The cubic root of 139898487 is about 519.1238784934.

The spelling of 139898487 in words is "one hundred thirty-nine million, eight hundred ninety-eight thousand, four hundred eighty-seven".