90629999 has 4 divisors (see below), whose sum is σ = 90650664. Its totient is φ = 90609336.

The previous prime is 90629993. The next prime is 90630013. The reversal of 90629999 is 99992609.

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 90629999 - 2⁸ = 90629743 is a prime.

It is a Duffinian number.

90629999 is a modest number, since divided by 9999 gives 9062 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 90629999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90629993) 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, 857 + ... + 13490.

It is an arithmetic number, because the mean of its divisors is an integer number (22662666).

Almost surely, 2^90629999 is an apocalyptic number.

90629999 is a deficient number, since it is larger than the sum of its proper divisors (20665).

90629999 is a wasteful number, since it uses less digits than its factorization.

90629999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20664.

The product of its (nonzero) digits is 708588, while the sum is 53.

The square root of 90629999 is about 9519.9789390523. The cubic root of 90629999 is about 449.1837036796.

The spelling of 90629999 in words is "ninety million, six hundred twenty-nine thousand, nine hundred ninety-nine".