139991454 has 24 divisors (see below), whose sum is σ = 306321912. Its totient is φ = 46201200.

The previous prime is 139991437. The next prime is 139991459. The reversal of 139991454 is 454199931.

It is a super-3 number, since 3×139991454³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139991459) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36684 + ... + 40319.

It is an arithmetic number, because the mean of its divisors is an integer number (12763413).

Almost surely, 2^139991454 is an apocalyptic number.

139991454 is an abundant number, since it is smaller than the sum of its proper divisors (166330458).

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

139991454 is a wasteful number, since it uses less digits than its factorization.

139991454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77112 (or 77109 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 139991454 is about 11831.7984262748. The cubic root of 139991454 is about 519.2388444809.

The spelling of 139991454 in words is "one hundred thirty-nine million, nine hundred ninety-one thousand, four hundred fifty-four".