1406637749 has 32 divisors (see below), whose sum is σ = 1702010880. Its totient is φ = 1146745600.

The previous prime is 1406637737. The next prime is 1406637751. The reversal of 1406637749 is 9477366041.

It is a happy number.

It is not a de Polignac number, because 1406637749 - 2⁴ = 1406637733 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1406637709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1543604 + ... + 1544514.

It is an arithmetic number, because the mean of its divisors is an integer number (53187840).

Almost surely, 2^1406637749 is an apocalyptic number.

It is an amenable number.

1406637749 is a deficient number, since it is larger than the sum of its proper divisors (295373131).

1406637749 is a wasteful number, since it uses less digits than its factorization.

1406637749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321.

The product of its (nonzero) digits is 762048, while the sum is 47.

The square root of 1406637749 is about 37505.1696303323. The cubic root of 1406637749 is about 1120.4541496333.

It can be divided in two parts, 14066 and 37749, that added together give a palindrome (51815).

The spelling of 1406637749 in words is "one billion, four hundred six million, six hundred thirty-seven thousand, seven hundred forty-nine".