61378299 has 12 divisors (see below), whose sum is σ = 88857496. Its totient is φ = 40826592.

The previous prime is 61378253. The next prime is 61378309. The reversal of 61378299 is 99287316.

61378299 is a `hidden beast` number, since 613 + 7 + 8 + 29 + 9 = 666.

It is not a de Polignac number, because 61378299 - 2⁸ = 61378043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61378249) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3349 + ... + 11574.

Almost surely, 2^61378299 is an apocalyptic number.

61378299 is a deficient number, since it is larger than the sum of its proper divisors (27479197).

61378299 is a wasteful number, since it uses less digits than its factorization.

61378299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15386 (or 15383 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 61378299 is about 7834.4303558076. The cubic root of 61378299 is about 394.4617975893.

The spelling of 61378299 in words is "sixty-one million, three hundred seventy-eight thousand, two hundred ninety-nine".