61831413 has 12 divisors (see below), whose sum is σ = 102071008. Its totient is φ = 35332200.

The previous prime is 61831409. The next prime is 61831417. The reversal of 61831413 is 31413816.

61831413 is a `hidden beast` number, since 618 + 3 + 1 + 41 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (61831409) and next prime (61831417).

It is not a de Polignac number, because 61831413 - 2² = 61831409 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61831417) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 490663 + ... + 490788.

Almost surely, 2^61831413 is an apocalyptic number.

61831413 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

61831413 is a deficient number, since it is larger than the sum of its proper divisors (40239595).

61831413 is a wasteful number, since it uses less digits than its factorization.

61831413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981464 (or 981461 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 61831413 is about 7863.2953015895. The cubic root of 61831413 is about 395.4300992635.

The spelling of 61831413 in words is "sixty-one million, eight hundred thirty-one thousand, four hundred thirteen".