61798973 has 2 divisors, whose sum is σ = 61798974. Its totient is φ = 61798972.

The previous prime is 61798949. The next prime is 61798987. The reversal of 61798973 is 37989716.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35307364 + 26491609 = 5942^2 + 5147^2 .

It is a cyclic number.

It is not a de Polignac number, because 61798973 - 2¹⁰ = 61797949 is a prime.

It is a super-2 number, since 2×61798973² = 7638226127709458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61798273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30899486 + 30899487.

It is an arithmetic number, because the mean of its divisors is an integer number (30899487).

Almost surely, 2^61798973 is an apocalyptic number.

It is an amenable number.

61798973 is a deficient number, since it is larger than the sum of its proper divisors (1).

61798973 is an equidigital number, since it uses as much as digits as its factorization.

61798973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 50.

The square root of 61798973 is about 7861.2322825369. The cubic root of 61798973 is about 395.3609327141.

The spelling of 61798973 in words is "sixty-one million, seven hundred ninety-eight thousand, nine hundred seventy-three".