121087739 has 2 divisors, whose sum is σ = 121087740. Its totient is φ = 121087738.

The previous prime is 121087711. The next prime is 121087751. The reversal of 121087739 is 937780121.

It is a strong prime.

It is an emirp because it is prime and its reverse (937780121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121087739 - 2¹² = 121083643 is a prime.

It is a super-2 number, since 2×121087739² = 29324481072264242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121087639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60543869 + 60543870.

It is an arithmetic number, because the mean of its divisors is an integer number (60543870).

Almost surely, 2^121087739 is an apocalyptic number.

121087739 is a deficient number, since it is larger than the sum of its proper divisors (1).

121087739 is an equidigital number, since it uses as much as digits as its factorization.

121087739 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 121087739 is about 11003.9874136606. The cubic root of 121087739 is about 494.7282649631.

The spelling of 121087739 in words is "one hundred twenty-one million, eighty-seven thousand, seven hundred thirty-nine".