1366442431 has 8 divisors (see below), whose sum is σ = 1372377600. Its totient is φ = 1360520280.

The previous prime is 1366442423. The next prime is 1366442447. The reversal of 1366442431 is 1342446631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1366442431 - 2³ = 1366442423 is a prime.

It is a super-2 number, since 2×1366442431² = 3734329834474379522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366442461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247026 + ... + 252496.

It is an arithmetic number, because the mean of its divisors is an integer number (171547200).

Almost surely, 2^1366442431 is an apocalyptic number.

1366442431 is a deficient number, since it is larger than the sum of its proper divisors (5935169).

1366442431 is an equidigital number, since it uses as much as digits as its factorization.

1366442431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6509.

The product of its digits is 41472, while the sum is 34.

The square root of 1366442431 is about 36965.4220995784. The cubic root of 1366442431 is about 1109.6783503819.

The spelling of 1366442431 in words is "one billion, three hundred sixty-six million, four hundred forty-two thousand, four hundred thirty-one".