91542449 has 2 divisors, whose sum is σ = 91542450. Its totient is φ = 91542448.

The previous prime is 91542419. The next prime is 91542457. The reversal of 91542449 is 94424519.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87759424 + 3783025 = 9368^2 + 1945^2 .

It is a cyclic number.

It is not a de Polignac number, because 91542449 - 2⁸ = 91542193 is a prime.

It is not a weakly prime, because it can be changed into another prime (91542419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45771224 + 45771225.

It is an arithmetic number, because the mean of its divisors is an integer number (45771225).

Almost surely, 2^91542449 is an apocalyptic number.

It is an amenable number.

91542449 is a deficient number, since it is larger than the sum of its proper divisors (1).

91542449 is an equidigital number, since it uses as much as digits as its factorization.

91542449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 38.

The square root of 91542449 is about 9567.7818223452. The cubic root of 91542449 is about 450.6861122051.

The spelling of 91542449 in words is "ninety-one million, five hundred forty-two thousand, four hundred forty-nine".