139354992 has 100 divisors (see below), whose sum is σ = 460982896. Its totient is φ = 39813120.

The previous prime is 139354961. The next prime is 139354993. The reversal of 139354992 is 299453931.

139354992 is a `hidden beast` number, since 13 + 9 + 3 + 549 + 92 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139354993) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1392 + ... + 16752.

Almost surely, 2^139354992 is an apocalyptic number.

139354992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139354992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230491448).

139354992 is an abundant number, since it is smaller than the sum of its proper divisors (321627904).

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

139354992 is a wasteful number, since it uses less digits than its factorization.

139354992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15388 (or 15373 counting only the distinct ones).

The product of its digits is 262440, while the sum is 45.

The square root of 139354992 is about 11804.8715367851. The cubic root of 139354992 is about 518.4507537757.

The spelling of 139354992 in words is "one hundred thirty-nine million, three hundred fifty-four thousand, nine hundred ninety-two".