477649261 has 4 divisors (see below), whose sum is σ = 477761724. Its totient is φ = 477536800.

The previous prime is 477649259. The next prime is 477649279. The reversal of 477649261 is 162946774.

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

It can be written as a sum of positive squares in 2 ways, for example, as 324360100 + 153289161 = 18010^2 + 12381^2 .

It is a cyclic number.

It is not a de Polignac number, because 477649261 - 2¹ = 477649259 is a prime.

It is a super-2 number, since 2×477649261² = 456297633067692242, 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 (477649201) 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, 49600 + ... + 58441.

It is an arithmetic number, because the mean of its divisors is an integer number (119440431).

Almost surely, 2^477649261 is an apocalyptic number.

It is an amenable number.

477649261 is a deficient number, since it is larger than the sum of its proper divisors (112463).

477649261 is a wasteful number, since it uses less digits than its factorization.

477649261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112462.

The product of its digits is 508032, while the sum is 46.

The square root of 477649261 is about 21855.1884228894. The cubic root of 477649261 is about 781.6932648607.

The spelling of 477649261 in words is "four hundred seventy-seven million, six hundred forty-nine thousand, two hundred sixty-one".