61309942 has 16 divisors (see below), whose sum is σ = 93486960. Its totient is φ = 30151072.

The previous prime is 61309931. The next prime is 61309943. The reversal of 61309942 is 24990316.

It is a junction number, because it is equal to n+sod(n) for n = 61309898 and 61309907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61309943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43968 + ... + 45340.

It is an arithmetic number, because the mean of its divisors is an integer number (5842935).

Almost surely, 2^61309942 is an apocalyptic number.

61309942 is a deficient number, since it is larger than the sum of its proper divisors (32177018).

61309942 is a wasteful number, since it uses less digits than its factorization.

61309942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1727.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 61309942 is about 7830.0665386700. The cubic root of 61309942 is about 394.3153058501.

The spelling of 61309942 in words is "sixty-one million, three hundred nine thousand, nine hundred forty-two".