74149091 has 2 divisors, whose sum is σ = 74149092. Its totient is φ = 74149090.

The previous prime is 74149037. The next prime is 74149109. The reversal of 74149091 is 19094147.

Together with next prime (74149109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74149091 is a prime.

It is a super-2 number, since 2×74149091² = 10996175392252562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74149021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37074545 + 37074546.

It is an arithmetic number, because the mean of its divisors is an integer number (37074546).

Almost surely, 2^74149091 is an apocalyptic number.

74149091 is a deficient number, since it is larger than the sum of its proper divisors (1).

74149091 is an equidigital number, since it uses as much as digits as its factorization.

74149091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 74149091 is about 8610.9866449786. The cubic root of 74149091 is about 420.1154085721.

The spelling of 74149091 in words is "seventy-four million, one hundred forty-nine thousand, ninety-one".