139937898 has 8 divisors (see below), whose sum is σ = 279875808. Its totient is φ = 46645964.

The previous prime is 139937893. The next prime is 139937899. The reversal of 139937898 is 898739931.

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

139937898 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (139937893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11661486 + ... + 11661497.

It is an arithmetic number, because the mean of its divisors is an integer number (34984476).

Almost surely, 2^139937898 is an apocalyptic number.

139937898 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139937898 is a wasteful number, since it uses less digits than its factorization.

139937898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23322988.

The product of its digits is 2939328, while the sum is 57.

The square root of 139937898 is about 11829.5349866341. The cubic root of 139937898 is about 519.1726216231.

The spelling of 139937898 in words is "one hundred thirty-nine million, nine hundred thirty-seven thousand, eight hundred ninety-eight".