139673898 has 96 divisors (see below), whose sum is σ = 378024192. Its totient is φ = 36288000.

The previous prime is 139673867. The next prime is 139673929. The reversal of 139673898 is 898376931.

It is an interprime number because it is at equal distance from previous prime (139673867) and next prime (139673929).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 115698 + ... + 116898.

It is an arithmetic number, because the mean of its divisors is an integer number (3937752).

Almost surely, 2^139673898 is an apocalyptic number.

139673898 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 139673898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189012096).

139673898 is an abundant number, since it is smaller than the sum of its proper divisors (238350294).

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

139673898 is a wasteful number, since it uses less digits than its factorization.

139673898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300 (or 1297 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 139673898 is about 11818.3712075734. The cubic root of 139673898 is about 518.8459342002.

The spelling of 139673898 in words is "one hundred thirty-nine million, six hundred seventy-three thousand, eight hundred ninety-eight".