46778891 has 2 divisors, whose sum is σ = 46778892. Its totient is φ = 46778890.

The previous prime is 46778873. The next prime is 46778903. The reversal of 46778891 is 19887764.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 46778891 - 2²² = 42584587 is a prime.

It is not a weakly prime, because it can be changed into another prime (46778821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23389445 + 23389446.

It is an arithmetic number, because the mean of its divisors is an integer number (23389446).

Almost surely, 2^46778891 is an apocalyptic number.

46778891 is a deficient number, since it is larger than the sum of its proper divisors (1).

46778891 is an equidigital number, since it uses as much as digits as its factorization.

46778891 is an evil number, because the sum of its binary digits is even.

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

The square root of 46778891 is about 6839.5095584406. The cubic root of 46778891 is about 360.3158005661.

The spelling of 46778891 in words is "forty-six million, seven hundred seventy-eight thousand, eight hundred ninety-one".