607891261 has 2 divisors, whose sum is σ = 607891262. Its totient is φ = 607891260.

The previous prime is 607891259. The next prime is 607891267. The reversal of 607891261 is 162198706.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 425803225 + 182088036 = 20635^2 + 13494^2 .

It is a cyclic number.

It is not a de Polignac number, because 607891261 - 2¹ = 607891259 is a prime.

Together with 607891259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (607891267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303945630 + 303945631.

It is an arithmetic number, because the mean of its divisors is an integer number (303945631).

Almost surely, 2^607891261 is an apocalyptic number.

It is an amenable number.

607891261 is a deficient number, since it is larger than the sum of its proper divisors (1).

607891261 is an equidigital number, since it uses as much as digits as its factorization.

607891261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 607891261 is about 24655.4509388898. The cubic root of 607891261 is about 847.1142095393.

The spelling of 607891261 in words is "six hundred seven million, eight hundred ninety-one thousand, two hundred sixty-one".