1406734657 has 4 divisors (see below), whose sum is σ = 1406877316. Its totient is φ = 1406592000.

The previous prime is 1406734631. The next prime is 1406734661. The reversal of 1406734657 is 7564376041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7564376041 = 173 ⋅43724717.

It can be written as a sum of positive squares in 2 ways, for example, as 677248576 + 729486081 = 26024^2 + 27009^2 .

It is a cyclic number.

It is not a de Polignac number, because 1406734657 - 2²³ = 1398346049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1406734057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55344 + ... + 76657.

It is an arithmetic number, because the mean of its divisors is an integer number (351719329).

Almost surely, 2^1406734657 is an apocalyptic number.

It is an amenable number.

1406734657 is a deficient number, since it is larger than the sum of its proper divisors (142659).

1406734657 is a wasteful number, since it uses less digits than its factorization.

1406734657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142658.

The product of its (nonzero) digits is 423360, while the sum is 43.

The square root of 1406734657 is about 37506.4615366473. The cubic root of 1406734657 is about 1120.4798796592.

The spelling of 1406734657 in words is "one billion, four hundred six million, seven hundred thirty-four thousand, six hundred fifty-seven".