137702891 has 2 divisors, whose sum is σ = 137702892. Its totient is φ = 137702890.

The previous prime is 137702857. The next prime is 137702897. The reversal of 137702891 is 198207731.

It is a strong prime.

It is an emirp because it is prime and its reverse (198207731) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137702891 is a prime.

It is not a weakly prime, because it can be changed into another prime (137702897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68851445 + 68851446.

It is an arithmetic number, because the mean of its divisors is an integer number (68851446).

Almost surely, 2^137702891 is an apocalyptic number.

137702891 is a deficient number, since it is larger than the sum of its proper divisors (1).

137702891 is an equidigital number, since it uses as much as digits as its factorization.

137702891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 137702891 is about 11734.6875118173. The cubic root of 137702891 is about 516.3938000489.

It can be divided in two parts, 13770 and 2891, that added together give a palindrome (16661).

The spelling of 137702891 in words is "one hundred thirty-seven million, seven hundred two thousand, eight hundred ninety-one".