91963129849 has 2 divisors, whose sum is σ = 91963129850. Its totient is φ = 91963129848.

The previous prime is 91963129831. The next prime is 91963129859. The reversal of 91963129849 is 94892136919.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90911295225 + 1051834624 = 301515^2 + 32432^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91963129849 is a prime.

It is a super-3 number, since 3×91963129849³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (91963129859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45981564924 + 45981564925.

It is an arithmetic number, because the mean of its divisors is an integer number (45981564925).

Almost surely, 2^91963129849 is an apocalyptic number.

It is an amenable number.

91963129849 is a deficient number, since it is larger than the sum of its proper divisors (1).

91963129849 is an equidigital number, since it uses as much as digits as its factorization.

91963129849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7558272, while the sum is 61.

The spelling of 91963129849 in words is "ninety-one billion, nine hundred sixty-three million, one hundred twenty-nine thousand, eight hundred forty-nine".