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40401709 is a prime number
BaseRepresentation
bin1001101000011…
…1101100101101
32211000121201121
42122013230231
540320323314
64001540541
71000260145
oct232075455
984017647
1040401709
1120895447
1211644751
1384a764a
145519925
153830d24
hex2687b2d

40401709 has 2 divisors, whose sum is σ = 40401710. Its totient is φ = 40401708.

The previous prime is 40401701. The next prime is 40401719. The reversal of 40401709 is 90710404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21068100 + 19333609 = 4590^2 + 4397^2 .

It is a cyclic number.

It is not a de Polignac number, because 40401709 - 23 = 40401701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40401701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20200854 + 20200855.

It is an arithmetic number, because the mean of its divisors is an integer number (20200855).

Almost surely, 240401709 is an apocalyptic number.

It is an amenable number.

40401709 is a deficient number, since it is larger than the sum of its proper divisors (1).

40401709 is an equidigital number, since it uses as much as digits as its factorization.

40401709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 40401709 is about 6356.2338692027. The cubic root of 40401709 is about 343.1362326353.

The spelling of 40401709 in words is "forty million, four hundred one thousand, seven hundred nine".