84784401 has 24 divisors (see below), whose sum is σ = 136776640. Its totient is φ = 52173072.

The previous prime is 84784393. The next prime is 84784409. The reversal of 84784401 is 10448748.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (84784393) and next prime (84784409).

It is not a de Polignac number, because 84784401 - 2³ = 84784393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84784409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10261 + ... + 16578.

Almost surely, 2^84784401 is an apocalyptic number.

84784401 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

84784401 is a deficient number, since it is larger than the sum of its proper divisors (51992239).

84784401 is a wasteful number, since it uses less digits than its factorization.

84784401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26867 (or 26855 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 84784401 is about 9207.8445360464. The cubic root of 84784401 is about 439.3109065522.

The spelling of 84784401 in words is "eighty-four million, seven hundred eighty-four thousand, four hundred one".