618725477 has 2 divisors, whose sum is σ = 618725478. Its totient is φ = 618725476.

The previous prime is 618725423. The next prime is 618725483. The reversal of 618725477 is 774527816.

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., 586075681 + 32649796 = 24209^2 + 5714^2 .

It is a cyclic number.

It is not a de Polignac number, because 618725477 - 2¹² = 618721381 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (618725407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309362738 + 309362739.

It is an arithmetic number, because the mean of its divisors is an integer number (309362739).

Almost surely, 2^618725477 is an apocalyptic number.

It is an amenable number.

618725477 is a deficient number, since it is larger than the sum of its proper divisors (1).

618725477 is an equidigital number, since it uses as much as digits as its factorization.

618725477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 658560, while the sum is 47.

The square root of 618725477 is about 24874.1929919344. The cubic root of 618725477 is about 852.1172027743.

The spelling of 618725477 in words is "six hundred eighteen million, seven hundred twenty-five thousand, four hundred seventy-seven".