137830442 has 4 divisors (see below), whose sum is σ = 206745666. Its totient is φ = 68915220.

The previous prime is 137830403. The next prime is 137830447. The reversal of 137830442 is 244038731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244038731 = 1031 ⋅236701.

It can be written as a sum of positive squares in only one way, i.e., 91604041 + 46226401 = 9571^2 + 6799^2 .

It is a junction number, because it is equal to n+sod(n) for n = 137830399 and 137830408.

It is not an unprimeable number, because it can be changed into a prime (137830447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34457609 + ... + 34457612.

Almost surely, 2^137830442 is an apocalyptic number.

137830442 is a deficient number, since it is larger than the sum of its proper divisors (68915224).

137830442 is an equidigital number, since it uses as much as digits as its factorization.

137830442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68915223.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 137830442 is about 11740.1210385583. The cubic root of 137830442 is about 516.5531920527.

The spelling of 137830442 in words is "one hundred thirty-seven million, eight hundred thirty thousand, four hundred forty-two".