919091002 has 4 divisors (see below), whose sum is σ = 1378636506. Its totient is φ = 459545500.

The previous prime is 919090979. The next prime is 919091027. The reversal of 919091002 is 200190919.

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., 863125641 + 55965361 = 29379^2 + 7481^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 229772749 + ... + 229772752.

Almost surely, 2^919091002 is an apocalyptic number.

919091002 is a deficient number, since it is larger than the sum of its proper divisors (459545504).

919091002 is a wasteful number, since it uses less digits than its factorization.

919091002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459545503.

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

The square root of 919091002 is about 30316.5136847890. The cubic root of 919091002 is about 972.2684013539.

The spelling of 919091002 in words is "nine hundred nineteen million, ninety-one thousand, two".