90471907 has 4 divisors (see below), whose sum is σ = 90995040. Its totient is φ = 89948776.

The previous prime is 90471881. The next prime is 90471911. The reversal of 90471907 is 70917409.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90471907 - 2⁷ = 90471779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90471917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261307 + ... + 261652.

It is an arithmetic number, because the mean of its divisors is an integer number (22748760).

Almost surely, 2^90471907 is an apocalyptic number.

90471907 is a deficient number, since it is larger than the sum of its proper divisors (523133).

90471907 is a wasteful number, since it uses less digits than its factorization.

90471907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523132.

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 90471907 is about 9511.6721453170. The cubic root of 90471907 is about 448.9223712236.

It can be divided in two parts, 90471 and 907, that added together give a triangular number (91378 = T₄₂₇).

The spelling of 90471907 in words is "ninety million, four hundred seventy-one thousand, nine hundred seven".