61192921 has 2 divisors, whose sum is σ = 61192922. Its totient is φ = 61192920.

The previous prime is 61192889. The next prime is 61192933. The reversal of 61192921 is 12929116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54096025 + 7096896 = 7355^2 + 2664^2 .

It is a cyclic number.

It is not a de Polignac number, because 61192921 - 2⁵ = 61192889 is a prime.

It is not a weakly prime, because it can be changed into another prime (61192991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30596460 + 30596461.

It is an arithmetic number, because the mean of its divisors is an integer number (30596461).

Almost surely, 2^61192921 is an apocalyptic number.

It is an amenable number.

61192921 is a deficient number, since it is larger than the sum of its proper divisors (1).

61192921 is an equidigital number, since it uses as much as digits as its factorization.

61192921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 31.

The square root of 61192921 is about 7822.5904277292. The cubic root of 61192921 is about 394.0642722843.

The spelling of 61192921 in words is "sixty-one million, one hundred ninety-two thousand, nine hundred twenty-one".