137143928 has 8 divisors (see below), whose sum is σ = 257144880. Its totient is φ = 68571960.

The previous prime is 137143901. The next prime is 137143931. The reversal of 137143928 is 829341731.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 137143891 and 137143900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8571488 + ... + 8571503.

It is an arithmetic number, because the mean of its divisors is an integer number (32143110).

Almost surely, 2^137143928 is an apocalyptic number.

It is an amenable number.

137143928 is a deficient number, since it is larger than the sum of its proper divisors (120000952).

137143928 is a wasteful number, since it uses less digits than its factorization.

137143928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17142997 (or 17142993 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 137143928 is about 11710.8465962116. The cubic root of 137143928 is about 515.6941379860.

The spelling of 137143928 in words is "one hundred thirty-seven million, one hundred forty-three thousand, nine hundred twenty-eight".