137951906 has 8 divisors (see below), whose sum is σ = 219100140. Its totient is φ = 64918528.

The previous prime is 137951903. The next prime is 137951959. The reversal of 137951906 is 609159731.

137951906 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 131905225 + 6046681 = 11485^2 + 2459^2 .

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

It is not an unprimeable number, because it can be changed into a prime (137951903) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2028671 + ... + 2028738.

Almost surely, 2^137951906 is an apocalyptic number.

137951906 is a deficient number, since it is larger than the sum of its proper divisors (81148234).

137951906 is a wasteful number, since it uses less digits than its factorization.

137951906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4057428.

The product of its (nonzero) digits is 51030, while the sum is 41.

The square root of 137951906 is about 11745.2929295101. The cubic root of 137951906 is about 516.7048861541.

The spelling of 137951906 in words is "one hundred thirty-seven million, nine hundred fifty-one thousand, nine hundred six".