91903144 has 8 divisors (see below), whose sum is σ = 172318410. Its totient is φ = 45951568.

The previous prime is 91903109. The next prime is 91903159. The reversal of 91903144 is 44130919.

It can be written as a sum of positive squares in only one way, i.e., 70392100 + 21511044 = 8390^2 + 4638^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5743939 + ... + 5743954.

Almost surely, 2^91903144 is an apocalyptic number.

It is an amenable number.

91903144 is a deficient number, since it is larger than the sum of its proper divisors (80415266).

91903144 is a wasteful number, since it uses less digits than its factorization.

91903144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11487899 (or 11487895 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 91903144 is about 9586.6127490371. The cubic root of 91903144 is about 451.2772666872.

The spelling of 91903144 in words is "ninety-one million, nine hundred three thousand, one hundred forty-four".