2609772421 has 4 divisors (see below), whose sum is σ = 2610159552. Its totient is φ = 2609385292.

The previous prime is 2609772401. The next prime is 2609772427. The reversal of 2609772421 is 1242779062.

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 2609772421 - 2⁹ = 2609771909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2609772427) 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, 183271 + ... + 196996.

It is an arithmetic number, because the mean of its divisors is an integer number (652539888).

Almost surely, 2^2609772421 is an apocalyptic number.

It is an amenable number.

2609772421 is a deficient number, since it is larger than the sum of its proper divisors (387131).

2609772421 is an equidigital number, since it uses as much as digits as its factorization.

2609772421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387130.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 2609772421 is about 51085.9317327187. The cubic root of 2609772421 is about 1376.7895018336.

The spelling of 2609772421 in words is "two billion, six hundred nine million, seven hundred seventy-two thousand, four hundred twenty-one".