21077097 has 8 divisors (see below), whose sum is σ = 28126080. Its totient is φ = 14039760.

The previous prime is 21077081. The next prime is 21077123. The reversal of 21077097 is 79077012.

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

It is not a de Polignac number, because 21077097 - 2⁴ = 21077081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21077027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3072 + ... + 7182.

It is an arithmetic number, because the mean of its divisors is an integer number (3515760).

Almost surely, 2^21077097 is an apocalyptic number.

It is an amenable number.

21077097 is a deficient number, since it is larger than the sum of its proper divisors (7048983).

21077097 is a wasteful number, since it uses less digits than its factorization.

21077097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5823.

The product of its (nonzero) digits is 6174, while the sum is 33.

The square root of 21077097 is about 4590.9799607491. The cubic root of 21077097 is about 276.2296319347.

The spelling of 21077097 in words is "twenty-one million, seventy-seven thousand, ninety-seven".