139219764 has 96 divisors (see below), whose sum is σ = 358162560. Its totient is φ = 41932800.

The previous prime is 139219757. The next prime is 139219771. The reversal of 139219764 is 467912931.

It is an interprime number because it is at equal distance from previous prime (139219757) and next prime (139219771).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 495304 + ... + 495584.

It is an arithmetic number, because the mean of its divisors is an integer number (3730860).

Almost surely, 2^139219764 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139219764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179081280).

139219764 is an abundant number, since it is smaller than the sum of its proper divisors (218942796).

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

139219764 is a wasteful number, since it uses less digits than its factorization.

139219764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401 (or 399 counting only the distinct ones).

The product of its digits is 81648, while the sum is 42.

The square root of 139219764 is about 11799.1425112167. The cubic root of 139219764 is about 518.2830005498.

The spelling of 139219764 in words is "one hundred thirty-nine million, two hundred nineteen thousand, seven hundred sixty-four".