74642387 has 2 divisors, whose sum is σ = 74642388. Its totient is φ = 74642386.

The previous prime is 74642341. The next prime is 74642401. The reversal of 74642387 is 78324647.

It is a strong prime.

It is an emirp because it is prime and its reverse (78324647) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74642387 - 2²² = 70448083 is a prime.

It is not a weakly prime, because it can be changed into another prime (74642587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37321193 + 37321194.

It is an arithmetic number, because the mean of its divisors is an integer number (37321194).

Almost surely, 2^74642387 is an apocalyptic number.

74642387 is a deficient number, since it is larger than the sum of its proper divisors (1).

74642387 is an equidigital number, since it uses as much as digits as its factorization.

74642387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 41.

The square root of 74642387 is about 8639.5825709348. The cubic root of 74642387 is about 421.0449923047.

The spelling of 74642387 in words is "seventy-four million, six hundred forty-two thousand, three hundred eighty-seven".