121673739 has 16 divisors (see below), whose sum is σ = 186295680. Its totient is φ = 69860160.

The previous prime is 121673737. The next prime is 121673803. The reversal of 121673739 is 937376121.

It is a happy number.

It is not a de Polignac number, because 121673739 - 2¹ = 121673737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121673697 and 121673706.

It is not an unprimeable number, because it can be changed into a prime (121673731) 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, 96402 + ... + 97655.

It is an arithmetic number, because the mean of its divisors is an integer number (11643480).

Almost surely, 2^121673739 is an apocalyptic number.

121673739 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

121673739 is a deficient number, since it is larger than the sum of its proper divisors (64621941).

121673739 is a wasteful number, since it uses less digits than its factorization.

121673739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194090.

The product of its digits is 47628, while the sum is 39.

The square root of 121673739 is about 11030.5819882724. The cubic root of 121673739 is about 495.5250545415.

The spelling of 121673739 in words is "one hundred twenty-one million, six hundred seventy-three thousand, seven hundred thirty-nine".