1420945917 has 4 divisors (see below), whose sum is σ = 1894594560. Its totient is φ = 947297276.

The previous prime is 1420945861. The next prime is 1420945937. The reversal of 1420945917 is 7195490241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1420945917 - 2⁷ = 1420945789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420945937) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 236824317 + ... + 236824322.

It is an arithmetic number, because the mean of its divisors is an integer number (473648640).

Almost surely, 2^1420945917 is an apocalyptic number.

It is an amenable number.

1420945917 is a deficient number, since it is larger than the sum of its proper divisors (473648643).

1420945917 is an equidigital number, since it uses as much as digits as its factorization.

1420945917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473648642.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 1420945917 is about 37695.4362887605. The cubic root of 1420945917 is about 1124.2403871668.

The spelling of 1420945917 in words is "one billion, four hundred twenty million, nine hundred forty-five thousand, nine hundred seventeen".