84770431 has 4 divisors (see below), whose sum is σ = 84915432. Its totient is φ = 84625432.

The previous prime is 84770417. The next prime is 84770437. The reversal of 84770431 is 13407748.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84770431 - 2¹³ = 84762239 is a prime.

It is a super-2 number, since 2×84770431² = 14372051943851522, 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 (84770437) 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, 71620 + ... + 72793.

It is an arithmetic number, because the mean of its divisors is an integer number (21228858).

Almost surely, 2^84770431 is an apocalyptic number.

84770431 is a deficient number, since it is larger than the sum of its proper divisors (145001).

84770431 is a wasteful number, since it uses less digits than its factorization.

84770431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145000.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 84770431 is about 9207.0859124915. The cubic root of 84770431 is about 439.2867766792.

The spelling of 84770431 in words is "eighty-four million, seven hundred seventy thousand, four hundred thirty-one".