61761969 has 24 divisors (see below), whose sum is σ = 98572032. Its totient is φ = 37065600.

The previous prime is 61761961. The next prime is 61761971. The reversal of 61761969 is 96916716.

It is not a de Polignac number, because 61761969 - 2³ = 61761961 is a prime.

It is a super-2 number, since 2×61761969² = 7629081629513922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61761961) 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, 5257 + ... + 12294.

It is an arithmetic number, because the mean of its divisors is an integer number (4107168).

Almost surely, 2^61761969 is an apocalyptic number.

61761969 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

61761969 is a deficient number, since it is larger than the sum of its proper divisors (36810063).

61761969 is a wasteful number, since it uses less digits than its factorization.

61761969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17597 (or 17594 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 61761969 is about 7858.8783550835. The cubic root of 61761969 is about 395.2820055289.

The spelling of 61761969 in words is "sixty-one million, seven hundred sixty-one thousand, nine hundred sixty-nine".