61213659 has 12 divisors (see below), whose sum is σ = 88380216. Its totient is φ = 37669632.

The previous prime is 61213631. The next prime is 61213661. The reversal of 61213659 is 95631216.

It is a happy number.

It is not a de Polignac number, because 61213659 - 2⁵ = 61213627 is a prime.

It is a super-2 number, since 2×61213659² = 7494224096336562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61213699) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59862 + ... + 60875.

It is an arithmetic number, because the mean of its divisors is an integer number (7365018).

Almost surely, 2^61213659 is an apocalyptic number.

61213659 is a deficient number, since it is larger than the sum of its proper divisors (27166557).

61213659 is a wasteful number, since it uses less digits than its factorization.

61213659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120766 (or 120753 counting only the distinct ones).

The product of its digits is 9720, while the sum is 33.

The square root of 61213659 is about 7823.9158354369. The cubic root of 61213659 is about 394.1087827808.

The spelling of 61213659 in words is "sixty-one million, two hundred thirteen thousand, six hundred fifty-nine".