625785481 has 2 divisors, whose sum is σ = 625785482. Its totient is φ = 625785480.

The previous prime is 625785451. The next prime is 625785497. The reversal of 625785481 is 184587526.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 590490000 + 35295481 = 24300^2 + 5941^2 .

It is a cyclic number.

It is not a de Polignac number, because 625785481 - 2⁷ = 625785353 is a prime.

It is a super-2 number, since 2×625785481² = 783214936460802722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (625785431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312892740 + 312892741.

It is an arithmetic number, because the mean of its divisors is an integer number (312892741).

Almost surely, 2^625785481 is an apocalyptic number.

It is an amenable number.

625785481 is a deficient number, since it is larger than the sum of its proper divisors (1).

625785481 is an equidigital number, since it uses as much as digits as its factorization.

625785481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 537600, while the sum is 46.

The square root of 625785481 is about 25015.7046872560. The cubic root of 625785481 is about 855.3459976933.

The spelling of 625785481 in words is "six hundred twenty-five million, seven hundred eighty-five thousand, four hundred eighty-one".