61554497 has 2 divisors, whose sum is σ = 61554498. Its totient is φ = 61554496.

The previous prime is 61554431. The next prime is 61554529. The reversal of 61554497 is 79445516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60855601 + 698896 = 7801^2 + 836^2 .

It is a cyclic number.

It is not a de Polignac number, because 61554497 - 2¹⁸ = 61292353 is a prime.

It is a super-2 number, since 2×61554497² = 7577912201846018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61554197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30777248 + 30777249.

It is an arithmetic number, because the mean of its divisors is an integer number (30777249).

Almost surely, 2^61554497 is an apocalyptic number.

It is an amenable number.

61554497 is a deficient number, since it is larger than the sum of its proper divisors (1).

61554497 is an equidigital number, since it uses as much as digits as its factorization.

61554497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 41.

The square root of 61554497 is about 7845.6674030958. The cubic root of 61554497 is about 394.8388960062.

The spelling of 61554497 in words is "sixty-one million, five hundred fifty-four thousand, four hundred ninety-seven".