121577633 has 4 divisors (see below), whose sum is σ = 121717140. Its totient is φ = 121438128.

The previous prime is 121577611. The next prime is 121577663. The reversal of 121577633 is 336775121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 88134544 + 33443089 = 9388^2 + 5783^2 .

It is a cyclic number.

It is not a de Polignac number, because 121577633 - 2⁸ = 121577377 is a prime.

It is a super-2 number, since 2×121577633² = 29562241691765378, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121577593 and 121577602.

It is not an unprimeable number, because it can be changed into a prime (121577663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68438 + ... + 70191.

It is an arithmetic number, because the mean of its divisors is an integer number (30429285).

Almost surely, 2^121577633 is an apocalyptic number.

It is an amenable number.

121577633 is a deficient number, since it is larger than the sum of its proper divisors (139507).

121577633 is an equidigital number, since it uses as much as digits as its factorization.

121577633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139506.

The product of its digits is 26460, while the sum is 35.

The square root of 121577633 is about 11026.2247845761. The cubic root of 121577633 is about 495.3945539767.

The spelling of 121577633 in words is "one hundred twenty-one million, five hundred seventy-seven thousand, six hundred thirty-three".