620525249 has 2 divisors, whose sum is σ = 620525250. Its totient is φ = 620525248.

The previous prime is 620525203. The next prime is 620525263. The reversal of 620525249 is 942525026.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 504316849 + 116208400 = 22457^2 + 10780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-620525249 is a prime.

It is not a weakly prime, because it can be changed into another prime (620545249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310262624 + 310262625.

It is an arithmetic number, because the mean of its divisors is an integer number (310262625).

Almost surely, 2^620525249 is an apocalyptic number.

It is an amenable number.

620525249 is a deficient number, since it is larger than the sum of its proper divisors (1).

620525249 is an equidigital number, since it uses as much as digits as its factorization.

620525249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 620525249 is about 24910.3442168108. The cubic root of 620525249 is about 852.9426265007.

The spelling of 620525249 in words is "six hundred twenty million, five hundred twenty-five thousand, two hundred forty-nine".