121647723 has 8 divisors (see below), whose sum is σ = 162265488. Its totient is φ = 81064224.

The previous prime is 121647719. The next prime is 121647787. The reversal of 121647723 is 327746121.

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

It is not a de Polignac number, because 121647723 - 2² = 121647719 is a prime.

It is a super-2 number, since 2×121647723² = 29596337022169458, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121647923) 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, 1365 + ... + 15657.

It is an arithmetic number, because the mean of its divisors is an integer number (20283186).

Almost surely, 2^121647723 is an apocalyptic number.

121647723 is a deficient number, since it is larger than the sum of its proper divisors (40617765).

121647723 is a wasteful number, since it uses less digits than its factorization.

121647723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17133.

The product of its digits is 14112, while the sum is 33.

The square root of 121647723 is about 11029.4026583492. The cubic root of 121647723 is about 495.4897346802.

The spelling of 121647723 in words is "one hundred twenty-one million, six hundred forty-seven thousand, seven hundred twenty-three".