121647977 has 8 divisors (see below), whose sum is σ = 133503552. Its totient is φ = 109925200.

The previous prime is 121647941. The next prime is 121647983. The reversal of 121647977 is 779746121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121647977 - 2²² = 117453673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121647907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31274 + ... + 34947.

It is an arithmetic number, because the mean of its divisors is an integer number (16687944).

Almost surely, 2^121647977 is an apocalyptic number.

It is an amenable number.

121647977 is a deficient number, since it is larger than the sum of its proper divisors (11855575).

121647977 is a wasteful number, since it uses less digits than its factorization.

121647977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66399.

The product of its digits is 148176, while the sum is 44.

The square root of 121647977 is about 11029.4141730193. The cubic root of 121647977 is about 495.4900795402.

The spelling of 121647977 in words is "one hundred twenty-one million, six hundred forty-seven thousand, nine hundred seventy-seven".