7401689 has 8 divisors (see below), whose sum is σ = 7689192. Its totient is φ = 7119360.

The previous prime is 7401677. The next prime is 7401703. The reversal of 7401689 is 9861047.

It can be written as a sum of positive squares in 4 ways, for example, as 537289 + 6864400 = 733^2 + 2620^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7401689 is a prime.

It is a super-3 number, since 3×7401689³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7401619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1757 + ... + 4229.

It is an arithmetic number, because the mean of its divisors is an integer number (961149).

Almost surely, 2^7401689 is an apocalyptic number.

It is an amenable number.

7401689 is a deficient number, since it is larger than the sum of its proper divisors (287503).

7401689 is a wasteful number, since it uses less digits than its factorization.

7401689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2587.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 7401689 is about 2720.6045284091. The cubic root of 7401689 is about 194.8843407931.

The spelling of 7401689 in words is "seven million, four hundred one thousand, six hundred eighty-nine".