137998445 has 8 divisors (see below), whose sum is σ = 178336536. Its totient is φ = 101906496.

The previous prime is 137998429. The next prime is 137998451. The reversal of 137998445 is 544899731.

It can be written as a sum of positive squares in 4 ways, for example, as 18992164 + 119006281 = 4358^2 + 10909^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 137998445 - 2⁴ = 137998429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 137998393 and 137998402.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1061462 + ... + 1061591.

It is an arithmetic number, because the mean of its divisors is an integer number (22292067).

Almost surely, 2^137998445 is an apocalyptic number.

It is an amenable number.

137998445 is a deficient number, since it is larger than the sum of its proper divisors (40338091).

137998445 is a wasteful number, since it uses less digits than its factorization.

137998445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123071.

The product of its digits is 1088640, while the sum is 50.

The square root of 137998445 is about 11747.2739390890. The cubic root of 137998445 is about 516.7629842400.

The spelling of 137998445 in words is "one hundred thirty-seven million, nine hundred ninety-eight thousand, four hundred forty-five".