601540609 has 2 divisors, whose sum is σ = 601540610. Its totient is φ = 601540608.

The previous prime is 601540607. The next prime is 601540651. The reversal of 601540609 is 906045106.

601540609 is nontrivially palindromic in base 12.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 483340225 + 118200384 = 21985^2 + 10872^2 .

It is a cyclic number.

It is not a de Polignac number, because 601540609 - 2¹ = 601540607 is a prime.

It is a super-2 number, since 2×601540609² = 723702208552181762, which contains 22 as substring.

Together with 601540607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (601540607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 300770304 + 300770305.

It is an arithmetic number, because the mean of its divisors is an integer number (300770305).

Almost surely, 2^601540609 is an apocalyptic number.

It is an amenable number.

601540609 is a deficient number, since it is larger than the sum of its proper divisors (1).

601540609 is an equidigital number, since it uses as much as digits as its factorization.

601540609 is an evil number, because the sum of its binary digits is even.

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

The square root of 601540609 is about 24526.3248164090. The cubic root of 601540609 is about 844.1539371853.

The spelling of 601540609 in words is "six hundred one million, five hundred forty thousand, six hundred nine".