139243432 has 16 divisors (see below), whose sum is σ = 268138260. Its totient is φ = 67739904.

The previous prime is 139243427. The next prime is 139243441. The reversal of 139243432 is 234342931.

It can be written as a sum of positive squares in 2 ways, for example, as 130279396 + 8964036 = 11414^2 + 2994^2 .

It is a junction number, because it is equal to n+sod(n) for n = 139243394 and 139243403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234913 + ... + 235504.

Almost surely, 2^139243432 is an apocalyptic number.

It is an amenable number.

139243432 is a deficient number, since it is larger than the sum of its proper divisors (128894828).

139243432 is a wasteful number, since it uses less digits than its factorization.

139243432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470460 (or 470456 counting only the distinct ones).

The product of its digits is 15552, while the sum is 31.

The square root of 139243432 is about 11800.1454228327. The cubic root of 139243432 is about 518.3123690499.

The spelling of 139243432 in words is "one hundred thirty-nine million, two hundred forty-three thousand, four hundred thirty-two".