1912172002 has 32 divisors (see below), whose sum is σ = 3324255984. Its totient is φ = 816998400.

The previous prime is 1912171997. The next prime is 1912172021. The reversal of 1912172002 is 2002712191.

It can be written as a sum of positive squares in 8 ways, for example, as 787307481 + 1124864521 = 28059^2 + 33539^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8499 + ... + 62422.

Almost surely, 2^1912172002 is an apocalyptic number.

1912172002 is a deficient number, since it is larger than the sum of its proper divisors (1412083982).

1912172002 is a wasteful number, since it uses less digits than its factorization.

1912172002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71014.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 1912172002 is about 43728.3889710106. The cubic root of 1912172002 is about 1241.2015759162.

Adding to 1912172002 its reverse (2002712191), we get a palindrome (3914884193).

The spelling of 1912172002 in words is "one billion, nine hundred twelve million, one hundred seventy-two thousand, two".