61797887 has 2 divisors, whose sum is σ = 61797888. Its totient is φ = 61797886.

The previous prime is 61797851. The next prime is 61797917. The reversal of 61797887 is 78879716.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61797887 - 2¹⁶ = 61732351 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61797817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30898943 + 30898944.

It is an arithmetic number, because the mean of its divisors is an integer number (30898944).

Almost surely, 2^61797887 is an apocalyptic number.

61797887 is a deficient number, since it is larger than the sum of its proper divisors (1).

61797887 is an equidigital number, since it uses as much as digits as its factorization.

61797887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1185408, while the sum is 53.

The square root of 61797887 is about 7861.1632090932. The cubic root of 61797887 is about 395.3586167938.

The spelling of 61797887 in words is "sixty-one million, seven hundred ninety-seven thousand, eight hundred eighty-seven".