781132137 has 8 divisors (see below), whose sum is σ = 1041642336. Its totient is φ = 520688352.

The previous prime is 781132129. The next prime is 781132147. The reversal of 781132137 is 731231187.

781132137 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 781132137 - 2³ = 781132129 is a prime.

It is a super-2 number, since 2×781132137² = 1220334830908373538, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 781132098 and 781132107.

It is not an unprimeable number, because it can be changed into a prime (781132147) 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, 27838 + ... + 48344.

It is an arithmetic number, because the mean of its divisors is an integer number (130205292).

Almost surely, 2^781132137 is an apocalyptic number.

It is an amenable number.

781132137 is a deficient number, since it is larger than the sum of its proper divisors (260510199).

781132137 is a wasteful number, since it uses less digits than its factorization.

781132137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33207.

The product of its digits is 7056, while the sum is 33.

The square root of 781132137 is about 27948.7412417805. The cubic root of 781132137 is about 920.9615564903.

The spelling of 781132137 in words is "seven hundred eighty-one million, one hundred thirty-two thousand, one hundred thirty-seven".