121793309 has 8 divisors (see below), whose sum is σ = 135692928. Its totient is φ = 108364960.

The previous prime is 121793293. The next prime is 121793317. The reversal of 121793309 is 903397121.

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

It is not a de Polignac number, because 121793309 - 2⁴ = 121793293 is a prime.

It is a super-2 number, since 2×121793309² = 29667220234338962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121793369) 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, 117272 + ... + 118305.

It is an arithmetic number, because the mean of its divisors is an integer number (16961616).

Almost surely, 2^121793309 is an apocalyptic number.

It is an amenable number.

121793309 is a deficient number, since it is larger than the sum of its proper divisors (13899619).

121793309 is a wasteful number, since it uses less digits than its factorization.

121793309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235635.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 121793309 is about 11036.0005889815. Note that the first 3 decimals coincide. The cubic root of 121793309 is about 495.6873205417.

The spelling of 121793309 in words is "one hundred twenty-one million, seven hundred ninety-three thousand, three hundred nine".