3257420989 has 2 divisors, whose sum is σ = 3257420990. Its totient is φ = 3257420988.

The previous prime is 3257420951. The next prime is 3257421001. The reversal of 3257420989 is 9890247523.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2082096900 + 1175324089 = 45630^2 + 34283^2 .

It is a cyclic number.

It is not a de Polignac number, because 3257420989 - 2¹³ = 3257412797 is a prime.

It is a super-2 number, since 2×3257420989² = 21221582999155476242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3257420909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1628710494 + 1628710495.

It is an arithmetic number, because the mean of its divisors is an integer number (1628710495).

Almost surely, 2^3257420989 is an apocalyptic number.

It is an amenable number.

3257420989 is a deficient number, since it is larger than the sum of its proper divisors (1).

3257420989 is an equidigital number, since it uses as much as digits as its factorization.

3257420989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The square root of 3257420989 is about 57073.8205221974. The cubic root of 3257420989 is about 1482.3745951687.

The spelling of 3257420989 in words is "three billion, two hundred fifty-seven million, four hundred twenty thousand, nine hundred eighty-nine".