121567477 has 2 divisors, whose sum is σ = 121567478. Its totient is φ = 121567476.

The previous prime is 121567463. The next prime is 121567487. The reversal of 121567477 is 774765121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98585041 + 22982436 = 9929^2 + 4794^2 .

It is a cyclic number.

It is not a de Polignac number, because 121567477 - 2⁷ = 121567349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121567417) 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, 60783738 + 60783739.

It is an arithmetic number, because the mean of its divisors is an integer number (60783739).

Almost surely, 2^121567477 is an apocalyptic number.

It is an amenable number.

121567477 is a deficient number, since it is larger than the sum of its proper divisors (1).

121567477 is an equidigital number, since it uses as much as digits as its factorization.

121567477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82320, while the sum is 40.

The square root of 121567477 is about 11025.7642365507. The cubic root of 121567477 is about 495.3807593143.

The spelling of 121567477 in words is "one hundred twenty-one million, five hundred sixty-seven thousand, four hundred seventy-seven".