1407721689 has 24 divisors (see below), whose sum is σ = 2219660352. Its totient is φ = 852613920.

The previous prime is 1407721673. The next prime is 1407721727. The reversal of 1407721689 is 9861277041.

It is a happy number.

It is not a de Polignac number, because 1407721689 - 2⁴ = 1407721673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1407721649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 191724 + ... + 198930.

It is an arithmetic number, because the mean of its divisors is an integer number (92485848).

Almost surely, 2^1407721689 is an apocalyptic number.

It is an amenable number.

1407721689 is a deficient number, since it is larger than the sum of its proper divisors (811938663).

1407721689 is a wasteful number, since it uses less digits than its factorization.

1407721689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9197 (or 9194 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The square root of 1407721689 is about 37519.6173887741. The cubic root of 1407721689 is about 1120.7418790656.

The spelling of 1407721689 in words is "one billion, four hundred seven million, seven hundred twenty-one thousand, six hundred eighty-nine".