1652788381 has 2 divisors, whose sum is σ = 1652788382. Its totient is φ = 1652788380.
The previous prime is 1652788337. The next prime is 1652788421. The reversal of 1652788381 is 1838872561.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 934280356 + 718508025 = 30566^2 + 26805^2 .
It is a cyclic number.
It is not a de Polignac number, because 1652788381 - 29 = 1652787869 is a prime.
It is a super-2 number, since 2×16527883812 = 5463418864737202322, which contains 22 as substring.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (1652786381) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 826394190 + 826394191.
It is an arithmetic number, because the mean of its divisors is an integer number (826394191).
Almost surely, 21652788381 is an apocalyptic number.
It is an amenable number.
1652788381 is a deficient number, since it is larger than the sum of its proper divisors (1).
1652788381 is an equidigital number, since it uses as much as digits as its factorization.
1652788381 is an evil number, because the sum of its binary digits is even.
The product of its digits is 645120, while the sum is 49.
The square root of 1652788381 is about 40654.5001322117. The cubic root of 1652788381 is about 1182.3310191545.
The spelling of 1652788381 in words is "one billion, six hundred fifty-two million, seven hundred eighty-eight thousand, three hundred eighty-one".
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