139741998 has 64 divisors (see below), whose sum is σ = 327905280. Its totient is φ = 39247200.

The previous prime is 139741993. The next prime is 139742027. The reversal of 139741998 is 899147931.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 139741998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139741993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57753 + ... + 60123.

It is an arithmetic number, because the mean of its divisors is an integer number (5123520).

Almost surely, 2^139741998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139741998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163952640).

139741998 is an abundant number, since it is smaller than the sum of its proper divisors (188163282).

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

139741998 is a wasteful number, since it uses less digits than its factorization.

139741998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2453.

The product of its digits is 489888, while the sum is 51.

The square root of 139741998 is about 11821.2519641534. The cubic root of 139741998 is about 518.9302440766.

The spelling of 139741998 in words is "one hundred thirty-nine million, seven hundred forty-one thousand, nine hundred ninety-eight".