84780431 has 8 divisors (see below), whose sum is σ = 87246480. Its totient is φ = 82323648.

The previous prime is 84780407. The next prime is 84780469. The reversal of 84780431 is 13408748.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 84780431 - 2¹⁰ = 84779407 is a prime.

It is a super-2 number, since 2×84780431² = 14375442961091522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84780391 and 84780400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84780401) 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, 19040 + ... + 23066.

It is an arithmetic number, because the mean of its divisors is an integer number (10905810).

Almost surely, 2^84780431 is an apocalyptic number.

84780431 is a deficient number, since it is larger than the sum of its proper divisors (2466049).

84780431 is a wasteful number, since it uses less digits than its factorization.

84780431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4633.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 84780431 is about 9207.6289564687. The cubic root of 84780431 is about 439.3040495852.

The spelling of 84780431 in words is "eighty-four million, seven hundred eighty thousand, four hundred thirty-one".