1420649953 has 4 divisors (see below), whose sum is σ = 1453688368. Its totient is φ = 1387611540.

The previous prime is 1420649929. The next prime is 1420649957. The reversal of 1420649953 is 3599460241.

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 an emirpimes, since its reverse is a distinct semiprime: 3599460241 = 13 ⋅276881557.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1420649953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 33038371 = 1420649953 / (1 + 4 + 2 + 0 + 6 + 4 + 9 + 9 + 5 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1420649957) 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, 16519143 + ... + 16519228.

It is an arithmetic number, because the mean of its divisors is an integer number (363422092).

Almost surely, 2^1420649953 is an apocalyptic number.

It is an amenable number.

1420649953 is a deficient number, since it is larger than the sum of its proper divisors (33038415).

1420649953 is an equidigital number, since it uses as much as digits as its factorization.

1420649953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33038414.

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 1420649953 is about 37691.5103571083. The cubic root of 1420649953 is about 1124.1623270094.

The spelling of 1420649953 in words is "one billion, four hundred twenty million, six hundred forty-nine thousand, nine hundred fifty-three".