61677793 has 2 divisors, whose sum is σ = 61677794. Its totient is φ = 61677792.

The previous prime is 61677769. The next prime is 61677799. The reversal of 61677793 is 39777616.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58262689 + 3415104 = 7633^2 + 1848^2 .

It is a cyclic number.

It is not a de Polignac number, because 61677793 - 2⁹ = 61677281 is a prime.

It is not a weakly prime, because it can be changed into another prime (61677799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30838896 + 30838897.

It is an arithmetic number, because the mean of its divisors is an integer number (30838897).

Almost surely, 2^61677793 is an apocalyptic number.

It is an amenable number.

61677793 is a deficient number, since it is larger than the sum of its proper divisors (1).

61677793 is an equidigital number, since it uses as much as digits as its factorization.

61677793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 333396, while the sum is 46.

The square root of 61677793 is about 7853.5210574621. The cubic root of 61677793 is about 395.1023459625.

The spelling of 61677793 in words is "sixty-one million, six hundred seventy-seven thousand, seven hundred ninety-three".