121765837 has 2 divisors, whose sum is σ = 121765838. Its totient is φ = 121765836.

The previous prime is 121765801. The next prime is 121765843. The reversal of 121765837 is 738567121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83064996 + 38700841 = 9114^2 + 6221^2 .

It is a cyclic number.

It is not a de Polignac number, because 121765837 - 2¹⁵ = 121733069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121765837.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121765537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60882918 + 60882919.

It is an arithmetic number, because the mean of its divisors is an integer number (60882919).

Almost surely, 2^121765837 is an apocalyptic number.

It is an amenable number.

121765837 is a deficient number, since it is larger than the sum of its proper divisors (1).

121765837 is an equidigital number, since it uses as much as digits as its factorization.

121765837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 40.

The square root of 121765837 is about 11034.7558649931. The cubic root of 121765837 is about 495.6500482531.

The spelling of 121765837 in words is "one hundred twenty-one million, seven hundred sixty-five thousand, eight hundred thirty-seven".