137997563 has 4 divisors (see below), whose sum is σ = 150542808. Its totient is φ = 125452320.

The previous prime is 137997557. The next prime is 137997577. The reversal of 137997563 is 365799731.

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

It is a cyclic number.

It is not a de Polignac number, because 137997563 - 2¹⁰ = 137996539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137997553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6272606 + ... + 6272627.

It is an arithmetic number, because the mean of its divisors is an integer number (37635702).

Almost surely, 2^137997563 is an apocalyptic number.

137997563 is a deficient number, since it is larger than the sum of its proper divisors (12545245).

137997563 is a wasteful number, since it uses less digits than its factorization.

137997563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12545244.

The product of its digits is 1071630, while the sum is 50.

The square root of 137997563 is about 11747.2363984045. The cubic root of 137997563 is about 516.7618832955.

The spelling of 137997563 in words is "one hundred thirty-seven million, nine hundred ninety-seven thousand, five hundred sixty-three".