121679892 has 18 divisors (see below), whose sum is σ = 307579818. Its totient is φ = 40559952.

The previous prime is 121679783. The next prime is 121679893. The reversal of 121679892 is 298976121.

It can be written as a sum of positive squares in only one way, i.e., 118461456 + 3218436 = 10884^2 + 1794^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×121679892² = 29611992234263328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121679893) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1689963 + ... + 1690034.

Almost surely, 2^121679892 is an apocalyptic number.

121679892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121679892 is an abundant number, since it is smaller than the sum of its proper divisors (185899926).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121679892 is a wasteful number, since it uses less digits than its factorization.

121679892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3380007 (or 3380002 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 121679892 is about 11030.8608911544. The cubic root of 121679892 is about 495.5334072457.

The spelling of 121679892 in words is "one hundred twenty-one million, six hundred seventy-nine thousand, eight hundred ninety-two".