61394947 has 4 divisors (see below), whose sum is σ = 64626280. Its totient is φ = 58163616.

The previous prime is 61394941. The next prime is 61394953. The reversal of 61394947 is 74949316.

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 (61394941) and next prime (61394953).

It is a cyclic number.

It is not a de Polignac number, because 61394947 - 2²³ = 53006339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61394941) 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, 1615638 + ... + 1615675.

It is an arithmetic number, because the mean of its divisors is an integer number (16156570).

Almost surely, 2^61394947 is an apocalyptic number.

61394947 is a deficient number, since it is larger than the sum of its proper divisors (3231333).

61394947 is a wasteful number, since it uses less digits than its factorization.

61394947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3231332.

The product of its digits is 163296, while the sum is 43.

The square root of 61394947 is about 7835.4927732721. The cubic root of 61394947 is about 394.4974584362.

The spelling of 61394947 in words is "sixty-one million, three hundred ninety-four thousand, nine hundred forty-seven".