121792387 has 2 divisors, whose sum is σ = 121792388. Its totient is φ = 121792386.

The previous prime is 121792381. The next prime is 121792409. The reversal of 121792387 is 783297121.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (783297121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121792387 - 2³ = 121792379 is a prime.

It is equal to p_6937870 and since 121792387 and 6937870 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (121792381) 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, 60896193 + 60896194.

It is an arithmetic number, because the mean of its divisors is an integer number (60896194).

Almost surely, 2^121792387 is an apocalyptic number.

121792387 is a deficient number, since it is larger than the sum of its proper divisors (1).

121792387 is an equidigital number, since it uses as much as digits as its factorization.

121792387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 40.

The square root of 121792387 is about 11035.9588165234. The cubic root of 121792387 is about 495.6860697207.

The spelling of 121792387 in words is "one hundred twenty-one million, seven hundred ninety-two thousand, three hundred eighty-seven".