91014091501 has 2 divisors, whose sum is σ = 91014091502. Its totient is φ = 91014091500.

The previous prime is 91014091489. The next prime is 91014091541. The reversal of 91014091501 is 10519041019.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80948785225 + 10065306276 = 284515^2 + 100326^2 .

It is an emirp because it is prime and its reverse (10519041019) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91014091501 - 2⁷ = 91014091373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91014091541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45507045750 + 45507045751.

It is an arithmetic number, because the mean of its divisors is an integer number (45507045751).

Almost surely, 2^91014091501 is an apocalyptic number.

It is an amenable number.

91014091501 is a deficient number, since it is larger than the sum of its proper divisors (1).

91014091501 is an equidigital number, since it uses as much as digits as its factorization.

91014091501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 31.

The spelling of 91014091501 in words is "ninety-one billion, fourteen million, ninety-one thousand, five hundred one".