1421929091 has 4 divisors (see below), whose sum is σ = 1551195384. Its totient is φ = 1292662800.

The previous prime is 1421929081. The next prime is 1421929097. The reversal of 1421929091 is 1909291241.

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

It is not a de Polignac number, because 1421929091 - 2²⁶ = 1354820227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421929097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64633130 + ... + 64633151.

It is an arithmetic number, because the mean of its divisors is an integer number (387798846).

Almost surely, 2^1421929091 is an apocalyptic number.

1421929091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1421929091 is a deficient number, since it is larger than the sum of its proper divisors (129266293).

1421929091 is a wasteful number, since it uses less digits than its factorization.

1421929091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129266292.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 1421929091 is about 37708.4750553506. The cubic root of 1421929091 is about 1124.4996203703.

The spelling of 1421929091 in words is "one billion, four hundred twenty-one million, nine hundred twenty-nine thousand, ninety-one".