61972147 has 2 divisors, whose sum is σ = 61972148. Its totient is φ = 61972146.

The previous prime is 61972093. The next prime is 61972171. The reversal of 61972147 is 74127916.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61972147 - 2⁷ = 61972019 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61973147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30986073 + 30986074.

It is an arithmetic number, because the mean of its divisors is an integer number (30986074).

Almost surely, 2^61972147 is an apocalyptic number.

61972147 is a deficient number, since it is larger than the sum of its proper divisors (1).

61972147 is an equidigital number, since it uses as much as digits as its factorization.

61972147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 37.

The square root of 61972147 is about 7872.2390080586. The cubic root of 61972147 is about 395.7298837276.

The spelling of 61972147 in words is "sixty-one million, nine hundred seventy-two thousand, one hundred forty-seven".