46778189 has 4 divisors (see below), whose sum is σ = 48391260. Its totient is φ = 45165120.

The previous prime is 46778177. The next prime is 46778201. The reversal of 46778189 is 98187764.

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

It is an interprime number because it is at equal distance from previous prime (46778177) and next prime (46778201).

It can be written as a sum of positive squares in 2 ways, for example, as 14002564 + 32775625 = 3742^2 + 5725^2 .

It is a cyclic number.

It is not a de Polignac number, because 46778189 - 2⁸ = 46777933 is a prime.

It is a super-2 number, since 2×46778189² = 4376397932239442, 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 (46778119) 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, 806492 + ... + 806549.

It is an arithmetic number, because the mean of its divisors is an integer number (12097815).

Almost surely, 2^46778189 is an apocalyptic number.

It is an amenable number.

46778189 is a deficient number, since it is larger than the sum of its proper divisors (1613071).

46778189 is a wasteful number, since it uses less digits than its factorization.

46778189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1613070.

The product of its digits is 677376, while the sum is 50.

The square root of 46778189 is about 6839.4582387789. The cubic root of 46778189 is about 360.3139981651.

The spelling of 46778189 in words is "forty-six million, seven hundred seventy-eight thousand, one hundred eighty-nine".