63541591 has 2 divisors, whose sum is σ = 63541592. Its totient is φ = 63541590.

The previous prime is 63541553. The next prime is 63541601. The reversal of 63541591 is 19514536.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63541591 - 2¹³ = 63533399 is a prime.

It is a super-2 number, since 2×63541591² = 8075067573622562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63541501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31770795 + 31770796.

It is an arithmetic number, because the mean of its divisors is an integer number (31770796).

Almost surely, 2^63541591 is an apocalyptic number.

63541591 is a deficient number, since it is larger than the sum of its proper divisors (1).

63541591 is an equidigital number, since it uses as much as digits as its factorization.

63541591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200, while the sum is 34.

The square root of 63541591 is about 7971.2979495186. The cubic root of 63541591 is about 399.0426919811.

The spelling of 63541591 in words is "sixty-three million, five hundred forty-one thousand, five hundred ninety-one".