3890429 has 2 divisors, whose sum is σ = 3890430. Its totient is φ = 3890428.

The previous prime is 3890423. The next prime is 3890431. The reversal of 3890429 is 9240983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2474329 + 1416100 = 1573^2 + 1190^2 .

It is an emirp because it is prime and its reverse (9240983) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3890429 is a prime.

Together with 3890431, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is equal to p₂₇₅₉₆₆ and since 3890429 and 275966 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3890423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1945214 + 1945215.

It is an arithmetic number, because the mean of its divisors is an integer number (1945215).

Almost surely, 2^3890429 is an apocalyptic number.

It is an amenable number.

3890429 is a deficient number, since it is larger than the sum of its proper divisors (1).

3890429 is an equidigital number, since it uses as much as digits as its factorization.

3890429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 3890429 is about 1972.4170451504. The cubic root of 3890429 is about 157.2772226219.

The spelling of 3890429 in words is "three million, eight hundred ninety thousand, four hundred twenty-nine".