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74257091 = 379195929
BaseRepresentation
bin1000110110100…
…01001011000011
312011201122120122
410123101023003
5123002211331
611211330455
71561113656
oct433211303
9164648518
1074257091
1138a094a7
1220a50a2b
13124cc40c
149c0d89d
1567bc17b
hex46d12c3

74257091 has 4 divisors (see below), whose sum is σ = 74453400. Its totient is φ = 74060784.

The previous prime is 74257063. The next prime is 74257103. The reversal of 74257091 is 19075247.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19075247 = 25175997.

It is a cyclic number.

It is not a de Polignac number, because 74257091 - 214 = 74240707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74257021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97586 + ... + 98343.

It is an arithmetic number, because the mean of its divisors is an integer number (18613350).

Almost surely, 274257091 is an apocalyptic number.

74257091 is a deficient number, since it is larger than the sum of its proper divisors (196309).

74257091 is a wasteful number, since it uses less digits than its factorization.

74257091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196308.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 74257091 is about 8617.2554215365. The cubic root of 74257091 is about 420.3192791461.

The spelling of 74257091 in words is "seventy-four million, two hundred fifty-seven thousand, ninety-one".

Divisors: 1 379 195929 74257091