91010002 has 4 divisors (see below), whose sum is σ = 136515006. Its totient is φ = 45505000.

The previous prime is 91009991. The next prime is 91010009. The reversal of 91010002 is 20001019.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 87403801 + 3606201 = 9349^2 + 1899^2 .

It is not an unprimeable number, because it can be changed into a prime (91010009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22752499 + ... + 22752502.

Almost surely, 2^91010002 is an apocalyptic number.

91010002 is a deficient number, since it is larger than the sum of its proper divisors (45505004).

91010002 is a wasteful number, since it uses less digits than its factorization.

91010002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45505003.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 91010002 is about 9539.9162470118. The cubic root of 91010002 is about 449.8106231950.

The spelling of 91010002 in words is "ninety-one million, ten thousand, two".