61197992 has 8 divisors (see below), whose sum is σ = 114746250. Its totient is φ = 30598992.

The previous prime is 61197959. The next prime is 61198003. The reversal of 61197992 is 29979116.

It can be written as a sum of positive squares in only one way, i.e., 55562116 + 5635876 = 7454^2 + 2374^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3824867 + ... + 3824882.

Almost surely, 2^61197992 is an apocalyptic number.

It is an amenable number.

61197992 is a deficient number, since it is larger than the sum of its proper divisors (53548258).

61197992 is a wasteful number, since it uses less digits than its factorization.

61197992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7649755 (or 7649751 counting only the distinct ones).

The product of its digits is 61236, while the sum is 44.

The square root of 61197992 is about 7822.9145463823. The cubic root of 61197992 is about 394.0751572292.

The spelling of 61197992 in words is "sixty-one million, one hundred ninety-seven thousand, nine hundred ninety-two".