1401438749 has 8 divisors (see below), whose sum is σ = 1419980160. Its totient is φ = 1382917536.

The previous prime is 1401438719. The next prime is 1401438763. The reversal of 1401438749 is 9478341041.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1401438749 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 (1401438719) 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, 177602 + ... + 185324.

It is an arithmetic number, because the mean of its divisors is an integer number (177497520).

Almost surely, 2^1401438749 is an apocalyptic number.

It is an amenable number.

1401438749 is a deficient number, since it is larger than the sum of its proper divisors (18541411).

1401438749 is an equidigital number, since it uses as much as digits as its factorization.

1401438749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10099.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 1401438749 is about 37435.7950229456. The cubic root of 1401438749 is about 1119.0720281666.

The spelling of 1401438749 in words is "one billion, four hundred one million, four hundred thirty-eight thousand, seven hundred forty-nine".