87457009 has 2 divisors, whose sum is σ = 87457010. Its totient is φ = 87457008.

The previous prime is 87457001. The next prime is 87457021. The reversal of 87457009 is 90075478.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80550625 + 6906384 = 8975^2 + 2628^2 .

It is a cyclic number.

It is not a de Polignac number, because 87457009 - 2³ = 87457001 is a prime.

It is not a weakly prime, because it can be changed into another prime (87457001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43728504 + 43728505.

It is an arithmetic number, because the mean of its divisors is an integer number (43728505).

Almost surely, 2^87457009 is an apocalyptic number.

It is an amenable number.

87457009 is a deficient number, since it is larger than the sum of its proper divisors (1).

87457009 is an equidigital number, since it uses as much as digits as its factorization.

87457009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 87457009 is about 9351.8452189929. The cubic root of 87457009 is about 443.8792806156.

The spelling of 87457009 in words is "eighty-seven million, four hundred fifty-seven thousand, nine".