137049781 has 8 divisors (see below), whose sum is σ = 149621184. Its totient is φ = 124497120.

The previous prime is 137049769. The next prime is 137049817. The reversal of 137049781 is 187940731.

137049781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 137049781 - 2¹¹ = 137047733 is a prime.

It is a super-2 number, since 2×137049781² = 37565284944295922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137049701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13801 + ... + 21553.

It is an arithmetic number, because the mean of its divisors is an integer number (18702648).

Almost surely, 2^137049781 is an apocalyptic number.

137049781 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

137049781 is a deficient number, since it is larger than the sum of its proper divisors (12571403).

137049781 is a wasteful number, since it uses less digits than its factorization.

137049781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9371.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 137049781 is about 11706.8262565052. The cubic root of 137049781 is about 515.5761058553.

The spelling of 137049781 in words is "one hundred thirty-seven million, forty-nine thousand, seven hundred eighty-one".