89077821 has 32 divisors (see below), whose sum is σ = 141834240. Its totient is φ = 48651456.

The previous prime is 89077819. The next prime is 89077853. The reversal of 89077821 is 12877098.

It is not a de Polignac number, because 89077821 - 2¹ = 89077819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89077801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64480 + ... + 65846.

It is an arithmetic number, because the mean of its divisors is an integer number (4432320).

Almost surely, 2^89077821 is an apocalyptic number.

It is an amenable number.

89077821 is a deficient number, since it is larger than the sum of its proper divisors (52756419).

89077821 is a wasteful number, since it uses less digits than its factorization.

89077821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513.

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 89077821 is about 9438.1047355918. The cubic root of 89077821 is about 446.6046030819.

It can be divided in two parts, 89077 and 821, that added together give a palindrome (89898).

The spelling of 89077821 in words is "eighty-nine million, seventy-seven thousand, eight hundred twenty-one".