280601591 has 2 divisors, whose sum is σ = 280601592. Its totient is φ = 280601590.

The previous prime is 280601551. The next prime is 280601597. The reversal of 280601591 is 195106082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 280601591 - 2⁶ = 280601527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280601597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140300795 + 140300796.

It is an arithmetic number, because the mean of its divisors is an integer number (140300796).

Almost surely, 2^280601591 is an apocalyptic number.

280601591 is a deficient number, since it is larger than the sum of its proper divisors (1).

280601591 is an equidigital number, since it uses as much as digits as its factorization.

280601591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 280601591 is about 16751.1668548791. The cubic root of 280601591 is about 654.6814611811.

The spelling of 280601591 in words is "two hundred eighty million, six hundred one thousand, five hundred ninety-one".