1400153789 has 4 divisors (see below), whose sum is σ = 1409072124. Its totient is φ = 1391235456.

The previous prime is 1400153759. The next prime is 1400153803. The reversal of 1400153789 is 9873510041.

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 327067225 + 1073086564 = 18085^2 + 32758^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1400153789 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 (1400153759) 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, 4458932 + ... + 4459245.

It is an arithmetic number, because the mean of its divisors is an integer number (352268031).

Almost surely, 2^1400153789 is an apocalyptic number.

It is an amenable number.

1400153789 is a deficient number, since it is larger than the sum of its proper divisors (8918335).

1400153789 is an equidigital number, since it uses as much as digits as its factorization.

1400153789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8918334.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 1400153789 is about 37418.6289032615. The cubic root of 1400153789 is about 1118.7299029753.

The spelling of 1400153789 in words is "one billion, four hundred million, one hundred fifty-three thousand, seven hundred eighty-nine".