121977533 has 8 divisors (see below), whose sum is σ = 134768448. Its totient is φ = 109810624.

The previous prime is 121977523. The next prime is 121977577. The reversal of 121977533 is 335779121.

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

It is a cyclic number.

It is not a de Polignac number, because 121977533 - 2⁶ = 121977469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121977523) 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, 155591 + ... + 156372.

It is an arithmetic number, because the mean of its divisors is an integer number (16846056).

Almost surely, 2^121977533 is an apocalyptic number.

It is an amenable number.

121977533 is a deficient number, since it is larger than the sum of its proper divisors (12790915).

121977533 is a wasteful number, since it uses less digits than its factorization.

121977533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312003.

The product of its digits is 39690, while the sum is 38.

The square root of 121977533 is about 11044.3439370567. The cubic root of 121977533 is about 495.9371194241.

The spelling of 121977533 in words is "one hundred twenty-one million, nine hundred seventy-seven thousand, five hundred thirty-three".