1906729322 has 4 divisors (see below), whose sum is σ = 2860093986. Its totient is φ = 953364660.

The previous prime is 1906729289. The next prime is 1906729337. The reversal of 1906729322 is 2239276091.

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., 1166290801 + 740438521 = 34151^2 + 27211^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1906729322.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 476682329 + ... + 476682332.

Almost surely, 2^1906729322 is an apocalyptic number.

1906729322 is a deficient number, since it is larger than the sum of its proper divisors (953364664).

1906729322 is an equidigital number, since it uses as much as digits as its factorization.

1906729322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953364663.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 1906729322 is about 43666.1118259916. Note that the first 3 decimals coincide. The cubic root of 1906729322 is about 1240.0228321325.

The spelling of 1906729322 in words is "one billion, nine hundred six million, seven hundred twenty-nine thousand, three hundred twenty-two".