90471387 has 8 divisors (see below), whose sum is σ = 124788240. Its totient is φ = 58234400.

The previous prime is 90471377. The next prime is 90471391. The reversal of 90471387 is 78317409.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90471387 - 2¹⁰ = 90470363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90471307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 519864 + ... + 520037.

It is an arithmetic number, because the mean of its divisors is an integer number (15598530).

Almost surely, 2^90471387 is an apocalyptic number.

90471387 is a deficient number, since it is larger than the sum of its proper divisors (34316853).

90471387 is a wasteful number, since it uses less digits than its factorization.

90471387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039933.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 90471387 is about 9511.6448104416. The cubic root of 90471387 is about 448.9215111405.

Adding to 90471387 its sum of digits (39), we get a triangular number (90471426 = T₁₃₄₅₁).

The spelling of 90471387 in words is "ninety million, four hundred seventy-one thousand, three hundred eighty-seven".