61797949 has 2 divisors, whose sum is σ = 61797950. Its totient is φ = 61797948.

The previous prime is 61797929. The next prime is 61797959. The reversal of 61797949 is 94979716.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37295449 + 24502500 = 6107^2 + 4950^2 .

It is a cyclic number.

It is not a de Polignac number, because 61797949 - 2⁵ = 61797917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61797896 and 61797905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61797929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30898974 + 30898975.

It is an arithmetic number, because the mean of its divisors is an integer number (30898975).

Almost surely, 2^61797949 is an apocalyptic number.

It is an amenable number.

61797949 is a deficient number, since it is larger than the sum of its proper divisors (1).

61797949 is an equidigital number, since it uses as much as digits as its factorization.

61797949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 857304, while the sum is 52.

The square root of 61797949 is about 7861.1671525289. The cubic root of 61797949 is about 395.3587490110.

The spelling of 61797949 in words is "sixty-one million, seven hundred ninety-seven thousand, nine hundred forty-nine".