1407705989 has 4 divisors (see below), whose sum is σ = 1407781056. Its totient is φ = 1407630924.

The previous prime is 1407705947. The next prime is 1407706019. The reversal of 1407705989 is 9895077041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9895077041 = 77513 ⋅127657.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1407705989 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 (1407705289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17252 + ... + 55794.

It is an arithmetic number, because the mean of its divisors is an integer number (351945264).

Almost surely, 2^1407705989 is an apocalyptic number.

It is an amenable number.

1407705989 is a deficient number, since it is larger than the sum of its proper divisors (75067).

1407705989 is an equidigital number, since it uses as much as digits as its factorization.

1407705989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75066.

The product of its (nonzero) digits is 635040, while the sum is 50.

The square root of 1407705989 is about 37519.4081643088. The cubic root of 1407705989 is about 1120.7377125903.

The spelling of 1407705989 in words is "one billion, four hundred seven million, seven hundred five thousand, nine hundred eighty-nine".