137742646 has 8 divisors (see below), whose sum is σ = 208509840. Its totient is φ = 68239368.

The previous prime is 137742643. The next prime is 137742667. The reversal of 137742646 is 646247731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 137742599 and 137742608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137742643) by changing a digit.

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, 315706 + ... + 316141.

It is an arithmetic number, because the mean of its divisors is an integer number (26063730).

Almost surely, 2^137742646 is an apocalyptic number.

137742646 is a deficient number, since it is larger than the sum of its proper divisors (70767194).

137742646 is a wasteful number, since it uses less digits than its factorization.

137742646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631958.

The product of its digits is 169344, while the sum is 40.

The square root of 137742646 is about 11736.3812991910. The cubic root of 137742646 is about 516.4434897833.

The spelling of 137742646 in words is "one hundred thirty-seven million, seven hundred forty-two thousand, six hundred forty-six".