61887975 has 24 divisors (see below), whose sum is σ = 102566352. Its totient is φ = 32928000.

The previous prime is 61887971. The next prime is 61887979. The reversal of 61887975 is 57978816.

It is an interprime number because it is at equal distance from previous prime (61887971) and next prime (61887979).

It is not a de Polignac number, because 61887975 - 2² = 61887971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61887971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44389 + ... + 45761.

It is an arithmetic number, because the mean of its divisors is an integer number (4273598).

Almost surely, 2^61887975 is an apocalyptic number.

61887975 is a deficient number, since it is larger than the sum of its proper divisors (40678377).

61887975 is a wasteful number, since it uses less digits than its factorization.

61887975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1987 (or 1982 counting only the distinct ones).

The product of its digits is 846720, while the sum is 51.

The square root of 61887975 is about 7866.8910631837. The cubic root of 61887975 is about 395.5506393988.

The spelling of 61887975 in words is "sixty-one million, eight hundred eighty-seven thousand, nine hundred seventy-five".