245849557 has 2 divisors, whose sum is σ = 245849558. Its totient is φ = 245849556.

The previous prime is 245849509. The next prime is 245849587. The reversal of 245849557 is 755948542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191296561 + 54552996 = 13831^2 + 7386^2 .

It is a cyclic number.

It is not a de Polignac number, because 245849557 - 2²⁷ = 111631829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 245849557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245849587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122924778 + 122924779.

It is an arithmetic number, because the mean of its divisors is an integer number (122924779).

Almost surely, 2^245849557 is an apocalyptic number.

It is an amenable number.

245849557 is a deficient number, since it is larger than the sum of its proper divisors (1).

245849557 is an equidigital number, since it uses as much as digits as its factorization.

245849557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016000, while the sum is 49.

The square root of 245849557 is about 15679.5904602129. The cubic root of 245849557 is about 626.4548992412.

The spelling of 245849557 in words is "two hundred forty-five million, eight hundred forty-nine thousand, five hundred fifty-seven".