139771854 has 12 divisors (see below), whose sum is σ = 302839056. Its totient is φ = 46590612.

The previous prime is 139771831. The next prime is 139771861. The reversal of 139771854 is 458177931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3882534 + ... + 3882569.

It is an arithmetic number, because the mean of its divisors is an integer number (25236588).

Almost surely, 2^139771854 is an apocalyptic number.

139771854 is an abundant number, since it is smaller than the sum of its proper divisors (163067202).

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

139771854 is a wasteful number, since it uses less digits than its factorization.

139771854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7765111 (or 7765108 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 139771854 is about 11822.5147071171. The cubic root of 139771854 is about 518.9671980784.

It can be divided in two parts, 139771 and 854, that added together give a square (140625 = 375²).

The spelling of 139771854 in words is "one hundred thirty-nine million, seven hundred seventy-one thousand, eight hundred fifty-four".