74740447 has 2 divisors, whose sum is σ = 74740448. Its totient is φ = 74740446.

The previous prime is 74740429. The next prime is 74740451. The reversal of 74740447 is 74404747.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 74740447 - 2¹¹ = 74738399 is a prime.

It is a super-2 number, since 2×74740447² = 11172268835519618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74740747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37370223 + 37370224.

It is an arithmetic number, because the mean of its divisors is an integer number (37370224).

Almost surely, 2^74740447 is an apocalyptic number.

74740447 is a deficient number, since it is larger than the sum of its proper divisors (1).

74740447 is an equidigital number, since it uses as much as digits as its factorization.

74740447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87808, while the sum is 37.

The square root of 74740447 is about 8645.2557509885. The cubic root of 74740447 is about 421.2292915413.

The spelling of 74740447 in words is "seventy-four million, seven hundred forty thousand, four hundred forty-seven".