63428557 has 2 divisors, whose sum is σ = 63428558. Its totient is φ = 63428556.

The previous prime is 63428551. The next prime is 63428579. The reversal of 63428557 is 75582436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59814756 + 3613801 = 7734^2 + 1901^2 .

It is a cyclic number.

It is not a de Polignac number, because 63428557 - 2¹⁵ = 63395789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63428551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31714278 + 31714279.

It is an arithmetic number, because the mean of its divisors is an integer number (31714279).

Almost surely, 2^63428557 is an apocalyptic number.

It is an amenable number.

63428557 is a deficient number, since it is larger than the sum of its proper divisors (1).

63428557 is an equidigital number, since it uses as much as digits as its factorization.

63428557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201600, while the sum is 40.

The square root of 63428557 is about 7964.2047311706. The cubic root of 63428557 is about 398.8059328057.

The spelling of 63428557 in words is "sixty-three million, four hundred twenty-eight thousand, five hundred fifty-seven".