91574403287 has 2 divisors, whose sum is σ = 91574403288. Its totient is φ = 91574403286.

The previous prime is 91574403241. The next prime is 91574403299. The reversal of 91574403287 is 78230447519.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91574403287 - 2⁶ = 91574403223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91574403887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45787201643 + 45787201644.

It is an arithmetic number, because the mean of its divisors is an integer number (45787201644).

Almost surely, 2^91574403287 is an apocalyptic number.

91574403287 is a deficient number, since it is larger than the sum of its proper divisors (1).

91574403287 is an equidigital number, since it uses as much as digits as its factorization.

91574403287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 91574403287 in words is "ninety-one billion, five hundred seventy-four million, four hundred three thousand, two hundred eighty-seven".