61972379 has 16 divisors (see below), whose sum is σ = 73445376. Its totient is φ = 51170400.

The previous prime is 61972303. The next prime is 61972439. The reversal of 61972379 is 97327916.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61972379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61972679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59594 + ... + 60624.

It is an arithmetic number, because the mean of its divisors is an integer number (4590336).

Almost surely, 2^61972379 is an apocalyptic number.

61972379 is a deficient number, since it is larger than the sum of its proper divisors (11472997).

61972379 is a wasteful number, since it uses less digits than its factorization.

61972379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346.

The product of its digits is 142884, while the sum is 44.

The square root of 61972379 is about 7872.2537433698. The cubic root of 61972379 is about 395.7303775474.

The spelling of 61972379 in words is "sixty-one million, nine hundred seventy-two thousand, three hundred seventy-nine".