137745557 has 4 divisors (see below), whose sum is σ = 137769036. Its totient is φ = 137722080.

The previous prime is 137745533. The next prime is 137745581. The reversal of 137745557 is 755547731.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (137745533) and next prime (137745581).

It can be written as a sum of positive squares in 2 ways, for example, as 113401201 + 24344356 = 10649^2 + 4934^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137745557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137742557) 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, 5507 + ... + 17487.

It is an arithmetic number, because the mean of its divisors is an integer number (34442259).

Almost surely, 2^137745557 is an apocalyptic number.

It is an amenable number.

137745557 is a deficient number, since it is larger than the sum of its proper divisors (23479).

137745557 is a wasteful number, since it uses less digits than its factorization.

137745557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23478.

The product of its digits is 514500, while the sum is 44.

The square root of 137745557 is about 11736.5053146156. The cubic root of 137745557 is about 516.4471278635.

The spelling of 137745557 in words is "one hundred thirty-seven million, seven hundred forty-five thousand, five hundred fifty-seven".