61378 has 4 divisors (see below), whose sum is σ = 92070. Its totient is φ = 30688.

The previous prime is 61363. The next prime is 61379. The reversal of 61378 is 87316.

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., 33489 + 27889 = 183^2 + 167^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15343 + ... + 15346.

2⁶¹³⁷⁸ is an apocalyptic number.

61378 is a deficient number, since it is larger than the sum of its proper divisors (30692).

61378 is a wasteful number, since it uses less digits than its factorization.

61378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30691.

The product of its digits is 1008, while the sum is 25.

The square root of 61378 is about 247.7458375029. The cubic root of 61378 is about 39.4461157057.

The spelling of 61378 in words is "sixty-one thousand, three hundred seventy-eight".