83774985 has 32 divisors (see below), whose sum is σ = 155796480. Its totient is φ = 37645248.

The previous prime is 83774983. The next prime is 83774987. The reversal of 83774985 is 58947738.

It is an interprime number because it is at equal distance from previous prime (83774983) and next prime (83774987).

It is not a de Polignac number, because 83774985 - 2¹ = 83774983 is a prime.

It is a super-2 number, since 2×83774985² = 14036496223500450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (83774981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 567 + ... + 12956.

It is an arithmetic number, because the mean of its divisors is an integer number (4868640).

Almost surely, 2^83774985 is an apocalyptic number.

It is an amenable number.

83774985 is a deficient number, since it is larger than the sum of its proper divisors (72021495).

83774985 is a wasteful number, since it uses less digits than its factorization.

83774985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13597.

The product of its digits is 1693440, while the sum is 51.

The square root of 83774985 is about 9152.8675834407. The cubic root of 83774985 is about 437.5605097259.

The spelling of 83774985 in words is "eighty-three million, seven hundred seventy-four thousand, nine hundred eighty-five".