618473431 has 2 divisors, whose sum is σ = 618473432. Its totient is φ = 618473430.

The previous prime is 618473417. The next prime is 618473489. The reversal of 618473431 is 134374816.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 618473431 - 2⁹ = 618472919 is a prime.

It is a super-2 number, since 2×618473431² = 765018769705823522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (618470431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309236715 + 309236716.

It is an arithmetic number, because the mean of its divisors is an integer number (309236716).

Almost surely, 2^618473431 is an apocalyptic number.

618473431 is a deficient number, since it is larger than the sum of its proper divisors (1).

618473431 is an equidigital number, since it uses as much as digits as its factorization.

618473431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 37.

The square root of 618473431 is about 24869.1260602378. The cubic root of 618473431 is about 852.0014799911.

The spelling of 618473431 in words is "six hundred eighteen million, four hundred seventy-three thousand, four hundred thirty-one".