90919102 has 4 divisors (see below), whose sum is σ = 136378656. Its totient is φ = 45459550.

The previous prime is 90919093. The next prime is 90919117. The reversal of 90919102 is 20191909.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20191909 = 197 ⋅102497.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22729774 + ... + 22729777.

It is an arithmetic number, because the mean of its divisors is an integer number (34094664).

Almost surely, 2^90919102 is an apocalyptic number.

90919102 is a deficient number, since it is larger than the sum of its proper divisors (45459554).

90919102 is a wasteful number, since it uses less digits than its factorization.

90919102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45459553.

The product of its (nonzero) digits is 1458, while the sum is 31.

The square root of 90919102 is about 9535.1508640399. The cubic root of 90919102 is about 449.6608176605.

The spelling of 90919102 in words is "ninety million, nine hundred nineteen thousand, one hundred two".