139817454 has 16 divisors (see below), whose sum is σ = 319582848. Its totient is φ = 39947832.

The previous prime is 139817443. The next prime is 139817473. The reversal of 139817454 is 454718931.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 3328987 = 139817454 / (1 + 3 + 9 + 8 + 1 + 7 + 4 + 5 + 4).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1664452 + ... + 1664535.

It is an arithmetic number, because the mean of its divisors is an integer number (19973928).

Almost surely, 2^139817454 is an apocalyptic number.

139817454 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

139817454 is an abundant number, since it is smaller than the sum of its proper divisors (179765394).

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

139817454 is a wasteful number, since it uses less digits than its factorization.

139817454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3328999.

The product of its digits is 120960, while the sum is 42.

The square root of 139817454 is about 11824.4430735659. The cubic root of 139817454 is about 519.0236289226.

The spelling of 139817454 in words is "one hundred thirty-nine million, eight hundred seventeen thousand, four hundred fifty-four".