61957739 has 2 divisors, whose sum is σ = 61957740. Its totient is φ = 61957738.

The previous prime is 61957723. The next prime is 61957751. The reversal of 61957739 is 93775916.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61957739 - 2⁴ = 61957723 is a prime.

It is a super-2 number, since 2×61957739² = 7677522843984242, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 61957693 and 61957702.

It is not a weakly prime, because it can be changed into another prime (61957759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30978869 + 30978870.

It is an arithmetic number, because the mean of its divisors is an integer number (30978870).

Almost surely, 2^61957739 is an apocalyptic number.

61957739 is a deficient number, since it is larger than the sum of its proper divisors (1).

61957739 is an equidigital number, since it uses as much as digits as its factorization.

61957739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 357210, while the sum is 47.

The square root of 61957739 is about 7871.3238403715. The cubic root of 61957739 is about 395.6992134004.

The spelling of 61957739 in words is "sixty-one million, nine hundred fifty-seven thousand, seven hundred thirty-nine".