61972619 has 4 divisors (see below), whose sum is σ = 61988520. Its totient is φ = 61956720.

The previous prime is 61972613. The next prime is 61972639. The reversal of 61972619 is 91627916.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 61972619 - 2²⁰ = 60924043 is a prime.

It is a super-2 number, since 2×61972619² = 7681211011438322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61972613) 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, 2312 + ... + 11370.

It is an arithmetic number, because the mean of its divisors is an integer number (15497130).

Almost surely, 2^61972619 is an apocalyptic number.

61972619 is a deficient number, since it is larger than the sum of its proper divisors (15901).

61972619 is an equidigital number, since it uses as much as digits as its factorization.

61972619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15900.

The product of its digits is 40824, while the sum is 41.

The square root of 61972619 is about 7872.2689867661. The cubic root of 61972619 is about 395.7308883942.

The spelling of 61972619 in words is "sixty-one million, nine hundred seventy-two thousand, six hundred nineteen".