1423972217 has 4 divisors (see below), whose sum is σ = 1424054016. Its totient is φ = 1423890420.

The previous prime is 1423972183. The next prime is 1423972267. The reversal of 1423972217 is 7122793241.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7122793241 = 1831 ⋅3890111.

It is a cyclic number.

It is not a de Polignac number, because 1423972217 - 2¹⁴ = 1423955833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1423972267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3209 + ... + 53462.

It is an arithmetic number, because the mean of its divisors is an integer number (356013504).

Almost surely, 2^1423972217 is an apocalyptic number.

It is an amenable number.

1423972217 is a deficient number, since it is larger than the sum of its proper divisors (81799).

1423972217 is an equidigital number, since it uses as much as digits as its factorization.

1423972217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81798.

The product of its digits is 42336, while the sum is 38.

The square root of 1423972217 is about 37735.5564024171. The cubic root of 1423972217 is about 1125.0379488763.

The spelling of 1423972217 in words is "one billion, four hundred twenty-three million, nine hundred seventy-two thousand, two hundred seventeen".