74436991 has 2 divisors, whose sum is σ = 74436992. Its totient is φ = 74436990.

The previous prime is 74436979. The next prime is 74437001. The reversal of 74436991 is 19963447.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 74436991 - 2⁵ = 74436959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74436911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37218495 + 37218496.

It is an arithmetic number, because the mean of its divisors is an integer number (37218496).

Almost surely, 2^74436991 is an apocalyptic number.

74436991 is a deficient number, since it is larger than the sum of its proper divisors (1).

74436991 is an equidigital number, since it uses as much as digits as its factorization.

74436991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 43.

The square root of 74436991 is about 8627.6874653641. The cubic root of 74436991 is about 420.6584362364.

The spelling of 74436991 in words is "seventy-four million, four hundred thirty-six thousand, nine hundred ninety-one".