63942457 has 16 divisors (see below), whose sum is σ = 69383952. Its totient is φ = 58705920.

The previous prime is 63942449. The next prime is 63942469. The reversal of 63942457 is 75424936.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2178576 + 61763881 = 1476^2 + 7859^2 .

It is a cyclic number.

It is not a de Polignac number, because 63942457 - 2³ = 63942449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63942427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204133 + ... + 204445.

It is an arithmetic number, because the mean of its divisors is an integer number (4336497).

Almost surely, 2^63942457 is an apocalyptic number.

It is an amenable number.

63942457 is a deficient number, since it is larger than the sum of its proper divisors (5441495).

63942457 is a wasteful number, since it uses less digits than its factorization.

63942457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588.

The product of its digits is 181440, while the sum is 40.

The square root of 63942457 is about 7996.4027537387. The cubic root of 63942457 is about 399.8800828033.

The spelling of 63942457 in words is "sixty-three million, nine hundred forty-two thousand, four hundred fifty-seven".