609620251 has 4 divisors (see below), whose sum is σ = 626096512. Its totient is φ = 593143992.

The previous prime is 609620237. The next prime is 609620303. The reversal of 609620251 is 152026906.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 152026906 = 2 ⋅76013453.

It is a cyclic number.

It is not a de Polignac number, because 609620251 - 2¹¹ = 609618203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (609620201) 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, 8238075 + ... + 8238148.

It is an arithmetic number, because the mean of its divisors is an integer number (156524128).

Almost surely, 2^609620251 is an apocalyptic number.

609620251 is a deficient number, since it is larger than the sum of its proper divisors (16476261).

609620251 is a wasteful number, since it uses less digits than its factorization.

609620251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16476260.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 609620251 is about 24690.4890798056. The cubic root of 609620251 is about 847.9165819770.

The spelling of 609620251 in words is "six hundred nine million, six hundred twenty thousand, two hundred fifty-one".