137630381 has 4 divisors (see below), whose sum is σ = 157291872. Its totient is φ = 117968892.

The previous prime is 137630369. The next prime is 137630387. The reversal of 137630381 is 183036731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 137630381 - 2¹⁰ = 137629357 is a prime.

It is a super-2 number, since 2×137630381² = 37884243548410322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137630387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9830735 + ... + 9830748.

It is an arithmetic number, because the mean of its divisors is an integer number (39322968).

Almost surely, 2^137630381 is an apocalyptic number.

It is an amenable number.

137630381 is a deficient number, since it is larger than the sum of its proper divisors (19661491).

137630381 is an equidigital number, since it uses as much as digits as its factorization.

137630381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19661490.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 137630381 is about 11731.5975467964. The cubic root of 137630381 is about 516.3031452381.

The spelling of 137630381 in words is "one hundred thirty-seven million, six hundred thirty thousand, three hundred eighty-one".