61947394 has 4 divisors (see below), whose sum is σ = 92921094. Its totient is φ = 30973696.

The previous prime is 61947377. The next prime is 61947397. The reversal of 61947394 is 49374916.

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

It can be written as a sum of positive squares in only one way, i.e., 57380625 + 4566769 = 7575^2 + 2137^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 61947394.

It is not an unprimeable number, because it can be changed into a prime (61947397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15486847 + ... + 15486850.

Almost surely, 2^61947394 is an apocalyptic number.

61947394 is a deficient number, since it is larger than the sum of its proper divisors (30973700).

61947394 is a wasteful number, since it uses less digits than its factorization.

61947394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30973699.

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

The square root of 61947394 is about 7870.6666807838. Note that the first 4 decimals coincide. The cubic root of 61947394 is about 395.6771890535.

The spelling of 61947394 in words is "sixty-one million, nine hundred forty-seven thousand, three hundred ninety-four".