313620610549 has 2 divisors, whose sum is σ = 313620610550. Its totient is φ = 313620610548.

The previous prime is 313620610547. The next prime is 313620610643. The reversal of 313620610549 is 945016026313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 288215438449 + 25405172100 = 536857^2 + 159390^2 .

It is a cyclic number.

It is not a de Polignac number, because 313620610549 - 2¹ = 313620610547 is a prime.

It is a super-2 number, since 2×313620610549² (a number of 24 digits) contains 22 as substring.

Together with 313620610547, 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 (313620610543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156810305274 + 156810305275.

It is an arithmetic number, because the mean of its divisors is an integer number (156810305275).

Almost surely, 2^313620610549 is an apocalyptic number.

It is an amenable number.

313620610549 is a deficient number, since it is larger than the sum of its proper divisors (1).

313620610549 is an equidigital number, since it uses as much as digits as its factorization.

313620610549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 40.

The spelling of 313620610549 in words is "three hundred thirteen billion, six hundred twenty million, six hundred ten thousand, five hundred forty-nine".