7891054137 has 6 divisors (see below), whose sum is σ = 11398189322. Its totient is φ = 5260702752.

The previous prime is 7891054007. The next prime is 7891054159. The reversal of 7891054137 is 7314501987.

7891054137 is a `hidden beast` number, since 78 + 9 + 1 + 0 + 541 + 37 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5653385721 + 2237668416 = 75189^2 + 47304^2 .

It is not a de Polignac number, because 7891054137 - 2⁸ = 7891053881 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7891054092 and 7891054101.

It is not an unprimeable number, because it can be changed into a prime (7891054637) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 438391888 + ... + 438391905.

Almost surely, 2^7891054137 is an apocalyptic number.

It is an amenable number.

7891054137 is a deficient number, since it is larger than the sum of its proper divisors (3507135185).

7891054137 is a wasteful number, since it uses less digits than its factorization.

7891054137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876783799 (or 876783796 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The square root of 7891054137 is about 88831.6055072743. The cubic root of 7891054137 is about 1990.8796509195.

The spelling of 7891054137 in words is "seven billion, eight hundred ninety-one million, fifty-four thousand, one hundred thirty-seven".