61849897 has 2 divisors, whose sum is σ = 61849898. Its totient is φ = 61849896.

The previous prime is 61849891. The next prime is 61849919. The reversal of 61849897 is 79894816.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57093136 + 4756761 = 7556^2 + 2181^2 .

It is a cyclic number.

It is not a de Polignac number, because 61849897 - 2¹⁹ = 61325609 is a prime.

It is not a weakly prime, because it can be changed into another prime (61849891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30924948 + 30924949.

It is an arithmetic number, because the mean of its divisors is an integer number (30924949).

Almost surely, 2^61849897 is an apocalyptic number.

It is an amenable number.

61849897 is a deficient number, since it is larger than the sum of its proper divisors (1).

61849897 is an equidigital number, since it uses as much as digits as its factorization.

61849897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 52.

The square root of 61849897 is about 7864.4705479771. The cubic root of 61849897 is about 395.4694988793.

The spelling of 61849897 in words is "sixty-one million, eight hundred forty-nine thousand, eight hundred ninety-seven".