406169501 has 2 divisors, whose sum is σ = 406169502. Its totient is φ = 406169500.

The previous prime is 406169497. The next prime is 406169503. The reversal of 406169501 is 105961604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 312370276 + 93799225 = 17674^2 + 9685^2 .

It is a cyclic number.

It is not a de Polignac number, because 406169501 - 2² = 406169497 is a prime.

Together with 406169503, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_21647732 and since 406169501 and 21647732 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406169503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203084750 + 203084751.

It is an arithmetic number, because the mean of its divisors is an integer number (203084751).

Almost surely, 2^406169501 is an apocalyptic number.

It is an amenable number.

406169501 is a deficient number, since it is larger than the sum of its proper divisors (1).

406169501 is an equidigital number, since it uses as much as digits as its factorization.

406169501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 406169501 is about 20153.6473373928. The cubic root of 406169501 is about 740.5750953122.

The spelling of 406169501 in words is "four hundred six million, one hundred sixty-nine thousand, five hundred one".