121887407 has 2 divisors, whose sum is σ = 121887408. Its totient is φ = 121887406.

The previous prime is 121887343. The next prime is 121887427. The reversal of 121887407 is 704788121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121887407 - 2⁶ = 121887343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121887427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60943703 + 60943704.

It is an arithmetic number, because the mean of its divisors is an integer number (60943704).

Almost surely, 2^121887407 is an apocalyptic number.

121887407 is a deficient number, since it is larger than the sum of its proper divisors (1).

121887407 is an equidigital number, since it uses as much as digits as its factorization.

121887407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25088, while the sum is 38.

The square root of 121887407 is about 11040.2629950559. The cubic root of 121887407 is about 495.8149443517.

The spelling of 121887407 in words is "one hundred twenty-one million, eight hundred eighty-seven thousand, four hundred seven".