783401399 has 4 divisors (see below), whose sum is σ = 854619720. Its totient is φ = 712183080.

The previous prime is 783401357. The next prime is 783401401. The reversal of 783401399 is 993104387.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993104387 = 11 ⋅90282217.

It is a cyclic number.

It is not a de Polignac number, because 783401399 - 2²⁸ = 514965943 is a prime.

It is a super-2 number, since 2×783401399² = 1227435503910314402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (783401299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35609144 + ... + 35609165.

It is an arithmetic number, because the mean of its divisors is an integer number (213654930).

Almost surely, 2^783401399 is an apocalyptic number.

783401399 is a deficient number, since it is larger than the sum of its proper divisors (71218321).

783401399 is a wasteful number, since it uses less digits than its factorization.

783401399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71218320.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 783401399 is about 27989.3086552705. The cubic root of 783401399 is about 921.8525207871.

The spelling of 783401399 in words is "seven hundred eighty-three million, four hundred one thousand, three hundred ninety-nine".