137528738 has 4 divisors (see below), whose sum is σ = 206293110. Its totient is φ = 68764368.

The previous prime is 137528737. The next prime is 137528761. The reversal of 137528738 is 837825731.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 73736569 + 63792169 = 8587^2 + 7987^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (137528731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34382183 + ... + 34382186.

Almost surely, 2^137528738 is an apocalyptic number.

137528738 is a deficient number, since it is larger than the sum of its proper divisors (68764372).

137528738 is an equidigital number, since it uses as much as digits as its factorization.

137528738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68764371.

The product of its digits is 282240, while the sum is 44.

The square root of 137528738 is about 11727.2647279747. The cubic root of 137528738 is about 516.1760136063.

The spelling of 137528738 in words is "one hundred thirty-seven million, five hundred twenty-eight thousand, seven hundred thirty-eight".