89677421 has 2 divisors, whose sum is σ = 89677422. Its totient is φ = 89677420.

The previous prime is 89677387. The next prime is 89677439. The reversal of 89677421 is 12477698.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53509225 + 36168196 = 7315^2 + 6014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89677421 is a prime.

It is a super-2 number, since 2×89677421² = 16084079674422482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89677481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44838710 + 44838711.

It is an arithmetic number, because the mean of its divisors is an integer number (44838711).

Almost surely, 2^89677421 is an apocalyptic number.

It is an amenable number.

89677421 is a deficient number, since it is larger than the sum of its proper divisors (1).

89677421 is an equidigital number, since it uses as much as digits as its factorization.

89677421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 44.

The square root of 89677421 is about 9469.8163128965. The cubic root of 89677421 is about 447.6044236819.

The spelling of 89677421 in words is "eighty-nine million, six hundred seventy-seven thousand, four hundred twenty-one".