1618958357 has 2 divisors, whose sum is σ = 1618958358. Its totient is φ = 1618958356.

The previous prime is 1618958329. The next prime is 1618958359. The reversal of 1618958357 is 7538598161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1045164241 + 573794116 = 32329^2 + 23954^2 .

It is a cyclic number.

It is not a de Polignac number, because 1618958357 - 2²⁶ = 1551849493 is a prime.

Together with 1618958359, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1618958299 and 1618958308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1618958359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 809479178 + 809479179.

It is an arithmetic number, because the mean of its divisors is an integer number (809479179).

Almost surely, 2^1618958357 is an apocalyptic number.

It is an amenable number.

1618958357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1618958357 is an equidigital number, since it uses as much as digits as its factorization.

1618958357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1814400, while the sum is 53.

The square root of 1618958357 is about 40236.2816000684. The cubic root of 1618958357 is about 1174.2085164987.

The spelling of 1618958357 in words is "one billion, six hundred eighteen million, nine hundred fifty-eight thousand, three hundred fifty-seven".