137189213 has 4 divisors (see below), whose sum is σ = 156787680. Its totient is φ = 117590748.

The previous prime is 137189161. The next prime is 137189231. The reversal of 137189213 is 312981731.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 312981731 = 193 ⋅1621667.

It is a cyclic number.

It is not a de Polignac number, because 137189213 - 2¹² = 137185117 is a prime.

It is a super-3 number, since 3×137189213³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137189263) 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, 9799223 + ... + 9799236.

It is an arithmetic number, because the mean of its divisors is an integer number (39196920).

Almost surely, 2^137189213 is an apocalyptic number.

It is an amenable number.

137189213 is a deficient number, since it is larger than the sum of its proper divisors (19598467).

137189213 is an equidigital number, since it uses as much as digits as its factorization.

137189213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19598466.

The product of its digits is 9072, while the sum is 35.

The square root of 137189213 is about 11712.7799006043. The cubic root of 137189213 is about 515.7508925684.

The spelling of 137189213 in words is "one hundred thirty-seven million, one hundred eighty-nine thousand, two hundred thirteen".