4198761509 has 2 divisors, whose sum is σ = 4198761510. Its totient is φ = 4198761508.

The previous prime is 4198761467. The next prime is 4198761559. The reversal of 4198761509 is 9051678914.

It is an a-pointer prime, because the next prime (4198761559) can be obtained adding 4198761509 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3937939009 + 260822500 = 62753^2 + 16150^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4198761509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4198761559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2099380754 + 2099380755.

It is an arithmetic number, because the mean of its divisors is an integer number (2099380755).

Almost surely, 2^4198761509 is an apocalyptic number.

It is an amenable number.

4198761509 is a deficient number, since it is larger than the sum of its proper divisors (1).

4198761509 is an equidigital number, since it uses as much as digits as its factorization.

4198761509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 50.

The square root of 4198761509 is about 64797.8511140609. The cubic root of 4198761509 is about 1613.2700417944.

The spelling of 4198761509 in words is "four billion, one hundred ninety-eight million, seven hundred sixty-one thousand, five hundred nine".