137089861 has 2 divisors, whose sum is σ = 137089862. Its totient is φ = 137089860.

The previous prime is 137089831. The next prime is 137089877. The reversal of 137089861 is 168980731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89397025 + 47692836 = 9455^2 + 6906^2 .

It is a cyclic number.

It is not a de Polignac number, because 137089861 - 2⁵ = 137089829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137089801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68544930 + 68544931.

It is an arithmetic number, because the mean of its divisors is an integer number (68544931).

Almost surely, 2^137089861 is an apocalyptic number.

It is an amenable number.

137089861 is a deficient number, since it is larger than the sum of its proper divisors (1).

137089861 is an equidigital number, since it uses as much as digits as its factorization.

137089861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 137089861 is about 11708.5379531349. The cubic root of 137089861 is about 515.6263607727.

It can be divided in two parts, 1370898 and 61, that multiplied together give a triangular number (83624778 = T₁₂₉₃₂).

The spelling of 137089861 in words is "one hundred thirty-seven million, eighty-nine thousand, eight hundred sixty-one".