46878309 has 6 divisors (see below), whose sum is σ = 67713126. Its totient is φ = 31252200.

The previous prime is 46878289. The next prime is 46878313. The reversal of 46878309 is 90387864.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 33350625 + 13527684 = 5775^2 + 3678^2 .

It is not a de Polignac number, because 46878309 - 2⁸ = 46878053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (46878379) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2604342 + ... + 2604359.

It is an arithmetic number, because the mean of its divisors is an integer number (11285521).

Almost surely, 2^46878309 is an apocalyptic number.

It is an amenable number.

46878309 is a deficient number, since it is larger than the sum of its proper divisors (20834817).

46878309 is a wasteful number, since it uses less digits than its factorization.

46878309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5208707 (or 5208704 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 46878309 is about 6846.7736197424. The cubic root of 46878309 is about 360.5708766507.

It can be divided in two parts, 4687 and 8309, that added together give a square (12996 = 114²).

The spelling of 46878309 in words is "forty-six million, eight hundred seventy-eight thousand, three hundred nine".