401662361 has 4 divisors (see below), whose sum is σ = 401736372. Its totient is φ = 401588352.

The previous prime is 401662321. The next prime is 401662367. The reversal of 401662361 is 163266104.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 253796761 + 147865600 = 15931^2 + 12160^2 .

It is a cyclic number.

It is not a de Polignac number, because 401662361 - 2¹⁴ = 401645977 is a prime.

It is a super-2 number, since 2×401662361² = 322665304488188642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401662367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28160 + ... + 39953.

It is an arithmetic number, because the mean of its divisors is an integer number (100434093).

Almost surely, 2^401662361 is an apocalyptic number.

It is an amenable number.

401662361 is a deficient number, since it is larger than the sum of its proper divisors (74011).

401662361 is an equidigital number, since it uses as much as digits as its factorization.

401662361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74010.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 401662361 is about 20041.5159356771. The cubic root of 401662361 is about 737.8255873904.

The spelling of 401662361 in words is "four hundred one million, six hundred sixty-two thousand, three hundred sixty-one".