91420403 has 2 divisors, whose sum is σ = 91420404. Its totient is φ = 91420402.

The previous prime is 91420379. The next prime is 91420409. The reversal of 91420403 is 30402419.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91420403 - 2¹⁶ = 91354867 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (91420409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45710201 + 45710202.

It is an arithmetic number, because the mean of its divisors is an integer number (45710202).

Almost surely, 2^91420403 is an apocalyptic number.

91420403 is a deficient number, since it is larger than the sum of its proper divisors (1).

91420403 is an equidigital number, since it uses as much as digits as its factorization.

91420403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 91420403 is about 9561.4017277803. The cubic root of 91420403 is about 450.4857355846.

The spelling of 91420403 in words is "ninety-one million, four hundred twenty thousand, four hundred three".