87645403 has 2 divisors, whose sum is σ = 87645404. Its totient is φ = 87645402.

The previous prime is 87645359. The next prime is 87645431. The reversal of 87645403 is 30454678.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87645403 - 2¹³ = 87637211 is a prime.

It is not a weakly prime, because it can be changed into another prime (87645443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43822701 + 43822702.

It is an arithmetic number, because the mean of its divisors is an integer number (43822702).

Almost surely, 2^87645403 is an apocalyptic number.

87645403 is a deficient number, since it is larger than the sum of its proper divisors (1).

87645403 is an equidigital number, since it uses as much as digits as its factorization.

87645403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 87645403 is about 9361.9123580602. The cubic root of 87645403 is about 444.1977769832.

The spelling of 87645403 in words is "eighty-seven million, six hundred forty-five thousand, four hundred three".