90435406387 has 2 divisors, whose sum is σ = 90435406388. Its totient is φ = 90435406386.

The previous prime is 90435406361. The next prime is 90435406417. The reversal of 90435406387 is 78360453409.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90435406387 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90435406387.

It is not a weakly prime, because it can be changed into another prime (90435406337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45217703193 + 45217703194.

It is an arithmetic number, because the mean of its divisors is an integer number (45217703194).

Almost surely, 2^90435406387 is an apocalyptic number.

90435406387 is a deficient number, since it is larger than the sum of its proper divisors (1).

90435406387 is an equidigital number, since it uses as much as digits as its factorization.

90435406387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2177280, while the sum is 49.

The spelling of 90435406387 in words is "ninety billion, four hundred thirty-five million, four hundred six thousand, three hundred eighty-seven".