61897964 has 6 divisors (see below), whose sum is σ = 108321444. Its totient is φ = 30948980.

The previous prime is 61897949. The next prime is 61897999. The reversal of 61897964 is 46979816.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7737242 + ... + 7737249.

It is an arithmetic number, because the mean of its divisors is an integer number (18053574).

Almost surely, 2^61897964 is an apocalyptic number.

It is an amenable number.

61897964 is a deficient number, since it is larger than the sum of its proper divisors (46423480).

61897964 is a wasteful number, since it uses less digits than its factorization.

61897964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15474495 (or 15474493 counting only the distinct ones).

The product of its digits is 653184, while the sum is 50.

The square root of 61897964 is about 7867.5259135258. The cubic root of 61897964 is about 395.5719194767.

The spelling of 61897964 in words is "sixty-one million, eight hundred ninety-seven thousand, nine hundred sixty-four".