61972249 has 2 divisors, whose sum is σ = 61972250. Its totient is φ = 61972248.

The previous prime is 61972237. The next prime is 61972271. The reversal of 61972249 is 94227916.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61340224 + 632025 = 7832^2 + 795^2 .

It is a cyclic number.

It is not a de Polignac number, because 61972249 - 2⁹ = 61971737 is a prime.

It is a super-2 number, since 2×61972249² = 7681119292236002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61972219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30986124 + 30986125.

It is an arithmetic number, because the mean of its divisors is an integer number (30986125).

Almost surely, 2^61972249 is an apocalyptic number.

It is an amenable number.

61972249 is a deficient number, since it is larger than the sum of its proper divisors (1).

61972249 is an equidigital number, since it uses as much as digits as its factorization.

61972249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 61972249 is about 7872.2454865178. The cubic root of 61972249 is about 395.7301008382.

The spelling of 61972249 in words is "sixty-one million, nine hundred seventy-two thousand, two hundred forty-nine".