607387661 has 2 divisors, whose sum is σ = 607387662. Its totient is φ = 607387660.

The previous prime is 607387643. The next prime is 607387663. The reversal of 607387661 is 166783706.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 593653225 + 13734436 = 24365^2 + 3706^2 .

It is a cyclic number.

It is not a de Polignac number, because 607387661 - 2²⁶ = 540278797 is a prime.

Together with 607387663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (607387663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303693830 + 303693831.

It is an arithmetic number, because the mean of its divisors is an integer number (303693831).

Almost surely, 2^607387661 is an apocalyptic number.

It is an amenable number.

607387661 is a deficient number, since it is larger than the sum of its proper divisors (1).

607387661 is an equidigital number, since it uses as much as digits as its factorization.

607387661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 607387661 is about 24645.2360710950. The cubic root of 607387661 is about 846.8802178135.

The spelling of 607387661 in words is "six hundred seven million, three hundred eighty-seven thousand, six hundred sixty-one".