89257551421 has 2 divisors, whose sum is σ = 89257551422. Its totient is φ = 89257551420.

The previous prime is 89257551419. The next prime is 89257551503. The reversal of 89257551421 is 12415575298.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87920552196 + 1336999225 = 296514^2 + 36565^2 .

It is a cyclic number.

It is not a de Polignac number, because 89257551421 - 2¹ = 89257551419 is a prime.

It is a super-3 number, since 3×89257551421³ (a number of 34 digits) contains 333 as substring.

Together with 89257551419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89257551821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44628775710 + 44628775711.

It is an arithmetic number, because the mean of its divisors is an integer number (44628775711).

Almost surely, 2^89257551421 is an apocalyptic number.

It is an amenable number.

89257551421 is a deficient number, since it is larger than the sum of its proper divisors (1).

89257551421 is an equidigital number, since it uses as much as digits as its factorization.

89257551421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008000, while the sum is 49.

The spelling of 89257551421 in words is "eighty-nine billion, two hundred fifty-seven million, five hundred fifty-one thousand, four hundred twenty-one".