74640407 has 2 divisors, whose sum is σ = 74640408. Its totient is φ = 74640406.

The previous prime is 74640373. The next prime is 74640409. The reversal of 74640407 is 70404647.

It is a strong prime.

It is an emirp because it is prime and its reverse (70404647) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74640407 - 2¹⁴ = 74624023 is a prime.

Together with 74640409, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74640409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37320203 + 37320204.

It is an arithmetic number, because the mean of its divisors is an integer number (37320204).

Almost surely, 2^74640407 is an apocalyptic number.

74640407 is a deficient number, since it is larger than the sum of its proper divisors (1).

74640407 is an equidigital number, since it uses as much as digits as its factorization.

74640407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 74640407 is about 8639.4679813053. The cubic root of 74640407 is about 421.0412693241.

The spelling of 74640407 in words is "seventy-four million, six hundred forty thousand, four hundred seven".