121787377 has 2 divisors, whose sum is σ = 121787378. Its totient is φ = 121787376.

The previous prime is 121787363. The next prime is 121787399. The reversal of 121787377 is 773787121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117527281 + 4260096 = 10841^2 + 2064^2 .

It is a cyclic number.

It is not a de Polignac number, because 121787377 - 2¹⁹ = 121263089 is a prime.

It is not a weakly prime, because it can be changed into another prime (121787317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60893688 + 60893689.

It is an arithmetic number, because the mean of its divisors is an integer number (60893689).

Almost surely, 2^121787377 is an apocalyptic number.

It is an amenable number.

121787377 is a deficient number, since it is larger than the sum of its proper divisors (1).

121787377 is an equidigital number, since it uses as much as digits as its factorization.

121787377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 115248, while the sum is 43.

The square root of 121787377 is about 11035.7318289273. The cubic root of 121787377 is about 495.6792728502.

The spelling of 121787377 in words is "one hundred twenty-one million, seven hundred eighty-seven thousand, three hundred seventy-seven".