4019990257 has 2 divisors, whose sum is σ = 4019990258. Its totient is φ = 4019990256.

The previous prime is 4019990203. The next prime is 4019990281. The reversal of 4019990257 is 7520999104.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3845116081 + 174874176 = 62009^2 + 13224^2 .

It is a cyclic number.

It is not a de Polignac number, because 4019990257 - 2¹⁵ = 4019957489 is a prime.

It is not a weakly prime, because it can be changed into another prime (4019990857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2009995128 + 2009995129.

It is an arithmetic number, because the mean of its divisors is an integer number (2009995129).

Almost surely, 2^4019990257 is an apocalyptic number.

It is an amenable number.

4019990257 is a deficient number, since it is larger than the sum of its proper divisors (1).

4019990257 is an equidigital number, since it uses as much as digits as its factorization.

4019990257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 46.

The square root of 4019990257 is about 63403.3931032086. The cubic root of 4019990257 is about 1590.0410385885.

The spelling of 4019990257 in words is "four billion, nineteen million, nine hundred ninety thousand, two hundred fifty-seven".