61523749 has 8 divisors (see below), whose sum is σ = 70394688. Its totient is φ = 52673280.

The previous prime is 61523741. The next prime is 61523771. The reversal of 61523749 is 94732516.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61523749 - 2³ = 61523741 is a prime.

It is a plaindrome in base 5.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61523741) 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, 1989 + ... + 11269.

It is an arithmetic number, because the mean of its divisors is an integer number (8799336).

Almost surely, 2^61523749 is an apocalyptic number.

It is an amenable number.

61523749 is a deficient number, since it is larger than the sum of its proper divisors (8870939).

61523749 is an equidigital number, since it uses as much as digits as its factorization.

61523749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10235.

The product of its digits is 45360, while the sum is 37.

The square root of 61523749 is about 7843.7076054631. The cubic root of 61523749 is about 394.7731411114.

The spelling of 61523749 in words is "sixty-one million, five hundred twenty-three thousand, seven hundred forty-nine".