61897374 has 192 divisors, whose sum is σ = 184384512. Its totient is φ = 14515200.

The previous prime is 61897373. The next prime is 61897379. The reversal of 61897374 is 47379816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61897373) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 871759 + ... + 871829.

It is an arithmetic number, because the mean of its divisors is an integer number (960336).

Almost surely, 2^61897374 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61897374, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92192256).

61897374 is an abundant number, since it is smaller than the sum of its proper divisors (122487138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61897374 is a wasteful number, since it uses less digits than its factorization.

61897374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 148 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 61897374 is about 7867.4884175320. The cubic root of 61897374 is about 395.5706626331.

The spelling of 61897374 in words is "sixty-one million, eight hundred ninety-seven thousand, three hundred seventy-four".