90437047 has 2 divisors, whose sum is σ = 90437048. Its totient is φ = 90437046.

The previous prime is 90437033. The next prime is 90437099. The reversal of 90437047 is 74073409.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90437047 - 2¹¹ = 90434999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90437647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45218523 + 45218524.

It is an arithmetic number, because the mean of its divisors is an integer number (45218524).

Almost surely, 2^90437047 is an apocalyptic number.

90437047 is a deficient number, since it is larger than the sum of its proper divisors (1).

90437047 is an equidigital number, since it uses as much as digits as its factorization.

90437047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 90437047 is about 9509.8394833982. The cubic root of 90437047 is about 448.8647052777.

The spelling of 90437047 in words is "ninety million, four hundred thirty-seven thousand, forty-seven".