90001667 has 4 divisors (see below), whose sum is σ = 102859056. Its totient is φ = 77144280.

The previous prime is 90001633. The next prime is 90001669. The reversal of 90001667 is 76610009.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76610009 = 7 ⋅10944287.

It is a cyclic number.

It is not a de Polignac number, because 90001667 - 2¹² = 89997571 is a prime.

It is a super-4 number, since 4×90001667⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90001669) 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, 6428684 + ... + 6428697.

It is an arithmetic number, because the mean of its divisors is an integer number (25714764).

Almost surely, 2^90001667 is an apocalyptic number.

90001667 is a deficient number, since it is larger than the sum of its proper divisors (12857389).

90001667 is a wasteful number, since it uses less digits than its factorization.

90001667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12857388.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 90001667 is about 9486.9208387126. The cubic root of 90001667 is about 448.1432414911.

The spelling of 90001667 in words is "ninety million, one thousand, six hundred sixty-seven".