121894477 has 2 divisors, whose sum is σ = 121894478. Its totient is φ = 121894476.

The previous prime is 121894463. The next prime is 121894499. The reversal of 121894477 is 774498121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120758121 + 1136356 = 10989^2 + 1066^2 .

It is a cyclic number.

It is not a de Polignac number, because 121894477 - 2¹⁵ = 121861709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121894277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60947238 + 60947239.

It is an arithmetic number, because the mean of its divisors is an integer number (60947239).

Almost surely, 2^121894477 is an apocalyptic number.

It is an amenable number.

121894477 is a deficient number, since it is larger than the sum of its proper divisors (1).

121894477 is an equidigital number, since it uses as much as digits as its factorization.

121894477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 43.

The square root of 121894477 is about 11040.5831820606. The cubic root of 121894477 is about 495.8245306411.

The spelling of 121894477 in words is "one hundred twenty-one million, eight hundred ninety-four thousand, four hundred seventy-seven".