137821830 has 32 divisors (see below), whose sum is σ = 332208864. Its totient is φ = 36592896.

The previous prime is 137821829. The next prime is 137821847. The reversal of 137821830 is 38128731.

It is a junction number, because it is equal to n+sod(n) for n = 137821791 and 137821800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2869 + ... + 16848.

It is an arithmetic number, because the mean of its divisors is an integer number (10381527).

Almost surely, 2^137821830 is an apocalyptic number.

137821830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

137821830 is an abundant number, since it is smaller than the sum of its proper divisors (194387034).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

137821830 is a wasteful number, since it uses less digits than its factorization.

137821830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19960.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 137821830 is about 11739.7542563718. The cubic root of 137821830 is about 516.5424333052.

The spelling of 137821830 in words is "one hundred thirty-seven million, eight hundred twenty-one thousand, eight hundred thirty".