121667087 has 4 divisors (see below), whose sum is σ = 121806696. Its totient is φ = 121527480.

The previous prime is 121667071. The next prime is 121667107. The reversal of 121667087 is 780766121.

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

It is a cyclic number.

It is not a de Polignac number, because 121667087 - 2⁴ = 121667071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121667087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121667017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68489 + ... + 70242.

It is an arithmetic number, because the mean of its divisors is an integer number (30451674).

Almost surely, 2^121667087 is an apocalyptic number.

121667087 is a deficient number, since it is larger than the sum of its proper divisors (139609).

121667087 is an equidigital number, since it uses as much as digits as its factorization.

121667087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139608.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 121667087 is about 11030.2804588097. The cubic root of 121667087 is about 495.5160241274.

The spelling of 121667087 in words is "one hundred twenty-one million, six hundred sixty-seven thousand, eighty-seven".