1406807909 has 16 divisors (see below), whose sum is σ = 1552216512. Its totient is φ = 1266789888.

The previous prime is 1406807879. The next prime is 1406807921. The reversal of 1406807909 is 9097086041.

It is not a de Polignac number, because 1406807909 - 2¹⁶ = 1406742373 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1406807909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1406807939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 828149 + ... + 829845.

It is an arithmetic number, because the mean of its divisors is an integer number (97013532).

Almost surely, 2^1406807909 is an apocalyptic number.

It is an amenable number.

1406807909 is a deficient number, since it is larger than the sum of its proper divisors (145408603).

1406807909 is a wasteful number, since it uses less digits than its factorization.

1406807909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3236.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 1406807909 is about 37507.4380490057. The cubic root of 1406807909 is about 1120.4993280006.

The spelling of 1406807909 in words is "one billion, four hundred six million, eight hundred seven thousand, nine hundred nine".