1401309911 has 4 divisors (see below), whose sum is σ = 1402800024. Its totient is φ = 1399819800.

The previous prime is 1401309901. The next prime is 1401309919. The reversal of 1401309911 is 1199031041.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1401309911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401309919) 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, 743645 + ... + 745526.

It is an arithmetic number, because the mean of its divisors is an integer number (350700006).

Almost surely, 2^1401309911 is an apocalyptic number.

1401309911 is a deficient number, since it is larger than the sum of its proper divisors (1490113).

1401309911 is an equidigital number, since it uses as much as digits as its factorization.

1401309911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1490112.

The product of its (nonzero) digits is 972, while the sum is 29.

The square root of 1401309911 is about 37434.0741971803. The cubic root of 1401309911 is about 1119.0377340241.

The spelling of 1401309911 in words is "one billion, four hundred one million, three hundred nine thousand, nine hundred eleven".