61149897 has 10 divisors (see below), whose sum is σ = 91347498. Its totient is φ = 40766544.

The previous prime is 61149859. The next prime is 61149917. The reversal of 61149897 is 79894116.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 59351616 + 1798281 = 7704^2 + 1341^2 .

It is not a de Polignac number, because 61149897 - 2⁷ = 61149769 is a prime.

It is a super-2 number, since 2×61149897² = 7478619806221218, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61149857) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 377388 + ... + 377549.

Almost surely, 2^61149897 is an apocalyptic number.

It is an amenable number.

61149897 is a deficient number, since it is larger than the sum of its proper divisors (30197601).

61149897 is an equidigital number, since it uses as much as digits as its factorization.

61149897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754949 (or 754940 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 61149897 is about 7819.8399599992. The cubic root of 61149897 is about 393.9718966960.

The spelling of 61149897 in words is "sixty-one million, one hundred forty-nine thousand, eight hundred ninety-seven".