61738819 has 2 divisors, whose sum is σ = 61738820. Its totient is φ = 61738818.

The previous prime is 61738813. The next prime is 61738823. The reversal of 61738819 is 91883716.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61738819 - 2¹¹ = 61736771 is a prime.

It is a super-2 number, since 2×61738819² = 7623363543029522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61738813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30869409 + 30869410.

It is an arithmetic number, because the mean of its divisors is an integer number (30869410).

Almost surely, 2^61738819 is an apocalyptic number.

61738819 is a deficient number, since it is larger than the sum of its proper divisors (1).

61738819 is an equidigital number, since it uses as much as digits as its factorization.

61738819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 43.

The square root of 61738819 is about 7857.4053605500. The cubic root of 61738819 is about 395.2326120152.

The spelling of 61738819 in words is "sixty-one million, seven hundred thirty-eight thousand, eight hundred nineteen".