91402379 has 2 divisors, whose sum is σ = 91402380. Its totient is φ = 91402378.

The previous prime is 91402349. The next prime is 91402393. The reversal of 91402379 is 97320419.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91402379 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91402309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45701189 + 45701190.

It is an arithmetic number, because the mean of its divisors is an integer number (45701190).

Almost surely, 2^91402379 is an apocalyptic number.

91402379 is a deficient number, since it is larger than the sum of its proper divisors (1).

91402379 is an equidigital number, since it uses as much as digits as its factorization.

91402379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 91402379 is about 9560.4591416940. The cubic root of 91402379 is about 450.4561284499.

The spelling of 91402379 in words is "ninety-one million, four hundred two thousand, three hundred seventy-nine".