121772943 has 16 divisors (see below), whose sum is σ = 186626400. Its totient is φ = 78382080.

The previous prime is 121772939. The next prime is 121772951. The reversal of 121772943 is 349277121.

It is not a de Polignac number, because 121772943 - 2² = 121772939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121772898 and 121772907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121772243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76978 + ... + 78543.

It is an arithmetic number, because the mean of its divisors is an integer number (11664150).

Almost surely, 2^121772943 is an apocalyptic number.

121772943 is a deficient number, since it is larger than the sum of its proper divisors (64853457).

121772943 is a wasteful number, since it uses less digits than its factorization.

121772943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155559 (or 155553 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 121772943 is about 11035.0778429515. The cubic root of 121772943 is about 495.6596897662.

The spelling of 121772943 in words is "one hundred twenty-one million, seven hundred seventy-two thousand, nine hundred forty-three".