787474409 has 4 divisors (see below), whose sum is σ = 789022020. Its totient is φ = 785926800.

The previous prime is 787474379. The next prime is 787474447. The reversal of 787474409 is 904474787.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 904474787 = 887 ⋅1019701.

It can be written as a sum of positive squares in 2 ways, for example, as 228010000 + 559464409 = 15100^2 + 23653^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-787474409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (787471409) 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, 773042 + ... + 774059.

It is an arithmetic number, because the mean of its divisors is an integer number (197255505).

Almost surely, 2^787474409 is an apocalyptic number.

It is an amenable number.

787474409 is a deficient number, since it is larger than the sum of its proper divisors (1547611).

787474409 is a wasteful number, since it uses less digits than its factorization.

787474409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1547610.

The product of its (nonzero) digits is 1580544, while the sum is 50.

The square root of 787474409 is about 28061.9744316041. The cubic root of 787474409 is about 923.4473720689.

The spelling of 787474409 in words is "seven hundred eighty-seven million, four hundred seventy-four thousand, four hundred nine".