61400691 has 24 divisors (see below), whose sum is σ = 97044480. Its totient is φ = 37100400.

The previous prime is 61400683. The next prime is 61400747. The reversal of 61400691 is 19600416.

It is not a de Polignac number, because 61400691 - 2³ = 61400683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61400621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41950 + ... + 43388.

It is an arithmetic number, because the mean of its divisors is an integer number (4043520).

Almost surely, 2^61400691 is an apocalyptic number.

61400691 is a deficient number, since it is larger than the sum of its proper divisors (35643789).

61400691 is a wasteful number, since it uses less digits than its factorization.

61400691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887 (or 1884 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 61400691 is about 7835.8593019528. The cubic root of 61400691 is about 394.5097608750.

The spelling of 61400691 in words is "sixty-one million, four hundred thousand, six hundred ninety-one".