90471487 has 2 divisors, whose sum is σ = 90471488. Its totient is φ = 90471486.

The previous prime is 90471481. The next prime is 90471497. The reversal of 90471487 is 78417409.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90471487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90471481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45235743 + 45235744.

It is an arithmetic number, because the mean of its divisors is an integer number (45235744).

Almost surely, 2^90471487 is an apocalyptic number.

90471487 is a deficient number, since it is larger than the sum of its proper divisors (1).

90471487 is an equidigital number, since it uses as much as digits as its factorization.

90471487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 90471487 is about 9511.6500671545. The cubic root of 90471487 is about 448.9216765413.

The spelling of 90471487 in words is "ninety million, four hundred seventy-one thousand, four hundred eighty-seven".