264670381 has 2 divisors, whose sum is σ = 264670382. Its totient is φ = 264670380.

The previous prime is 264670379. The next prime is 264670391. The reversal of 264670381 is 183076462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162154756 + 102515625 = 12734^2 + 10125^2 .

It is a cyclic number.

It is not a de Polignac number, because 264670381 - 2¹ = 264670379 is a prime.

It is a super-2 number, since 2×264670381² = 140100821157370322, which contains 22 as substring.

Together with 264670379, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 264670381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264670391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132335190 + 132335191.

It is an arithmetic number, because the mean of its divisors is an integer number (132335191).

Almost surely, 2^264670381 is an apocalyptic number.

It is an amenable number.

264670381 is a deficient number, since it is larger than the sum of its proper divisors (1).

264670381 is an equidigital number, since it uses as much as digits as its factorization.

264670381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 264670381 is about 16268.6932788101. The cubic root of 264670381 is about 642.0494045242.

The spelling of 264670381 in words is "two hundred sixty-four million, six hundred seventy thousand, three hundred eighty-one".