840055137 has 4 divisors (see below), whose sum is σ = 1120073520. Its totient is φ = 560036756.

The previous prime is 840055123. The next prime is 840055147. The reversal of 840055137 is 731550048.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 840055137 - 2⁴ = 840055121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 840055098 and 840055107.

It is not an unprimeable number, because it can be changed into a prime (840055147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140009187 + ... + 140009192.

It is an arithmetic number, because the mean of its divisors is an integer number (280018380).

Almost surely, 2^840055137 is an apocalyptic number.

It is an amenable number.

840055137 is a deficient number, since it is larger than the sum of its proper divisors (280018383).

840055137 is a wasteful number, since it uses less digits than its factorization.

840055137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280018382.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 840055137 is about 28983.7046803889. The cubic root of 840055137 is about 943.5594400158.

The spelling of 840055137 in words is "eight hundred forty million, fifty-five thousand, one hundred thirty-seven".