139481091 has 6 divisors (see below), whose sum is σ = 201472700. Its totient is φ = 92987388.

The previous prime is 139481081. The next prime is 139481113. The reversal of 139481091 is 190184931.

It is not a de Polignac number, because 139481091 - 2⁷ = 139480963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139481011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7748941 + ... + 7748958.

Almost surely, 2^139481091 is an apocalyptic number.

139481091 is a deficient number, since it is larger than the sum of its proper divisors (61991609).

139481091 is a wasteful number, since it uses less digits than its factorization.

139481091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15497905 (or 15497902 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 139481091 is about 11810.2113020894. The cubic root of 139481091 is about 518.6070845284.

The spelling of 139481091 in words is "one hundred thirty-nine million, four hundred eighty-one thousand, ninety-one".