625418393 has 2 divisors, whose sum is σ = 625418394. Its totient is φ = 625418392.

The previous prime is 625418351. The next prime is 625418399. The reversal of 625418393 is 393814526.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 419553289 + 205865104 = 20483^2 + 14348^2 .

It is a cyclic number.

It is not a de Polignac number, because 625418393 - 2⁶ = 625418329 is a prime.

It is a super-3 number, since 3×625418393³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 625418393.

It is not a weakly prime, because it can be changed into another prime (625418399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312709196 + 312709197.

It is an arithmetic number, because the mean of its divisors is an integer number (312709197).

Almost surely, 2^625418393 is an apocalyptic number.

It is an amenable number.

625418393 is a deficient number, since it is larger than the sum of its proper divisors (1).

625418393 is an equidigital number, since it uses as much as digits as its factorization.

625418393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 41.

The square root of 625418393 is about 25008.3664600469. The cubic root of 625418393 is about 855.1787153063.

The spelling of 625418393 in words is "six hundred twenty-five million, four hundred eighteen thousand, three hundred ninety-three".