1420634309 has 4 divisors (see below), whose sum is σ = 1424728704. Its totient is φ = 1416539916.

The previous prime is 1420634269. The next prime is 1420634317. The reversal of 1420634309 is 9034360241.

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: 9034360241 = 25303 ⋅357047.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1420634309 is a prime.

It is a super-4 number, since 4×1420634309⁴ (a number of 38 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420634209) 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, 2046677 + ... + 2047370.

It is an arithmetic number, because the mean of its divisors is an integer number (356182176).

Almost surely, 2^1420634309 is an apocalyptic number.

It is an amenable number.

1420634309 is a deficient number, since it is larger than the sum of its proper divisors (4094395).

1420634309 is an equidigital number, since it uses as much as digits as its factorization.

1420634309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4094394.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 1420634309 is about 37691.3028296980. The cubic root of 1420634309 is about 1124.1582006211.

The spelling of 1420634309 in words is "one billion, four hundred twenty million, six hundred thirty-four thousand, three hundred nine".