3998890429 has 2 divisors, whose sum is σ = 3998890430. Its totient is φ = 3998890428.

The previous prime is 3998890369. The next prime is 3998890447. The reversal of 3998890429 is 9240988993.

3998890429 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2123827225 + 1875063204 = 46085^2 + 43302^2 .

It is a cyclic number.

It is not a de Polignac number, because 3998890429 - 2¹¹ = 3998888381 is a prime.

It is a super-2 number, since 2×3998890429² = 31982249326295608082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3998890829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1999445214 + 1999445215.

It is an arithmetic number, because the mean of its divisors is an integer number (1999445215).

Almost surely, 2^3998890429 is an apocalyptic number.

It is an amenable number.

3998890429 is a deficient number, since it is larger than the sum of its proper divisors (1).

3998890429 is an equidigital number, since it uses as much as digits as its factorization.

3998890429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10077696, while the sum is 61.

The square root of 3998890429 is about 63236.7806660016. The cubic root of 3998890429 is about 1587.2542605467.

The spelling of 3998890429 in words is "three billion, nine hundred ninety-eight million, eight hundred ninety thousand, four hundred twenty-nine".