1400639371 has 4 divisors (see below), whose sum is σ = 1400936992. Its totient is φ = 1400341752.

The previous prime is 1400639351. The next prime is 1400639399. The reversal of 1400639371 is 1739360041.

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

It is a cyclic number.

It is not a de Polignac number, because 1400639371 - 2¹³ = 1400631179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1400639351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141636 + ... + 151201.

It is an arithmetic number, because the mean of its divisors is an integer number (350234248).

Almost surely, 2^1400639371 is an apocalyptic number.

1400639371 is a deficient number, since it is larger than the sum of its proper divisors (297621).

1400639371 is an equidigital number, since it uses as much as digits as its factorization.

1400639371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297620.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 1400639371 is about 37425.1168468450. The cubic root of 1400639371 is about 1118.8592155125.

The spelling of 1400639371 in words is "one billion, four hundred million, six hundred thirty-nine thousand, three hundred seventy-one".