61981367 has 16 divisors (see below), whose sum is σ = 72244224. Its totient is φ = 52080000.

The previous prime is 61981349. The next prime is 61981373. The reversal of 61981367 is 76318916.

It is not a de Polignac number, because 61981367 - 2⁸ = 61981111 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 (61981397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154367 + ... + 154767.

It is an arithmetic number, because the mean of its divisors is an integer number (4515264).

Almost surely, 2^61981367 is an apocalyptic number.

61981367 is a deficient number, since it is larger than the sum of its proper divisors (10262857).

61981367 is a wasteful number, since it uses less digits than its factorization.

61981367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790.

The product of its digits is 54432, while the sum is 41.

The square root of 61981367 is about 7872.8245884181. The cubic root of 61981367 is about 395.7495078587.

The spelling of 61981367 in words is "sixty-one million, nine hundred eighty-one thousand, three hundred sixty-seven".