61895997 has 36 divisors (see below), whose sum is σ = 96981300. Its totient is φ = 38019072.

The previous prime is 61895987. The next prime is 61896001. The reversal of 61895997 is 79959816.

It can be written as a sum of positive squares in 6 ways, for example, as 12489156 + 49406841 = 3534^2 + 7029^2 .

It is not a de Polignac number, because 61895997 - 2¹² = 61891901 is a prime.

It is a super-2 number, since 2×61895997² = 7662228889248018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61895917) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 137629 + ... + 138077.

It is an arithmetic number, because the mean of its divisors is an integer number (2693925).

Almost surely, 2^61895997 is an apocalyptic number.

It is an amenable number.

61895997 is a deficient number, since it is larger than the sum of its proper divisors (35085303).

61895997 is a wasteful number, since it uses less digits than its factorization.

61895997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542 (or 522 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 54.

The square root of 61895997 is about 7867.4009050003. The cubic root of 61895997 is about 395.5677292570.

The spelling of 61895997 in words is "sixty-one million, eight hundred ninety-five thousand, nine hundred ninety-seven".