1009191010 has 32 divisors (see below), whose sum is σ = 1960899840. Its totient is φ = 372808128.

The previous prime is 1009190977. The next prime is 1009191011. The reversal of 1009191010 is 101919001.

It is not an unprimeable number, because it can be changed into a prime (1009191011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68982 + ... + 82321.

It is an arithmetic number, because the mean of its divisors is an integer number (61278120).

Almost surely, 2^1009191010 is an apocalyptic number.

1009191010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1009191010 is a deficient number, since it is larger than the sum of its proper divisors (951708830).

1009191010 is a wasteful number, since it uses less digits than its factorization.

1009191010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151362.

The product of its (nonzero) digits is 81, while the sum is 22.

The square root of 1009191010 is about 31767.7668399905. The cubic root of 1009191010 is about 1003.0543315608.

It can be divided in two parts, 10091 and 91010, that added together give a palindrome (101101).

The spelling of 1009191010 in words is "one billion, nine million, one hundred ninety-one thousand, ten".