61957499 has 16 divisors (see below), whose sum is σ = 69166080. Its totient is φ = 55248480.

The previous prime is 61957471. The next prime is 61957529. The reversal of 61957499 is 99475916.

It is a cyclic number.

It is not a de Polignac number, because 61957499 - 2²⁰ = 60908923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61957429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20372 + ... + 23214.

It is an arithmetic number, because the mean of its divisors is an integer number (4322880).

Almost surely, 2^61957499 is an apocalyptic number.

61957499 is a deficient number, since it is larger than the sum of its proper divisors (7208581).

61957499 is a wasteful number, since it uses less digits than its factorization.

61957499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2930.

The product of its digits is 612360, while the sum is 50.

The square root of 61957499 is about 7871.3085951448. The cubic root of 61957499 is about 395.6987024718.

The spelling of 61957499 in words is "sixty-one million, nine hundred fifty-seven thousand, four hundred ninety-nine".