164401247 has 2 divisors, whose sum is σ = 164401248. Its totient is φ = 164401246.

The previous prime is 164401241. The next prime is 164401301. The reversal of 164401247 is 742104461.

It is a happy number.

164401247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164401247 - 2⁸ = 164400991 is a prime.

It is a super-3 number, since 3×164401247³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164401241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82200623 + 82200624.

It is an arithmetic number, because the mean of its divisors is an integer number (82200624).

Almost surely, 2^164401247 is an apocalyptic number.

164401247 is a deficient number, since it is larger than the sum of its proper divisors (1).

164401247 is an equidigital number, since it uses as much as digits as its factorization.

164401247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 164401247 is about 12821.9049676715. The cubic root of 164401247 is about 547.8164078105.

The spelling of 164401247 in words is "one hundred sixty-four million, four hundred one thousand, two hundred forty-seven".