77990299 has 2 divisors, whose sum is σ = 77990300. Its totient is φ = 77990298.

The previous prime is 77990293. The next prime is 77990317. The reversal of 77990299 is 99209977.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77990299 - 2³ = 77990291 is a prime.

It is not a weakly prime, because it can be changed into another prime (77990291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38995149 + 38995150.

It is an arithmetic number, because the mean of its divisors is an integer number (38995150).

Almost surely, 2^77990299 is an apocalyptic number.

77990299 is a deficient number, since it is larger than the sum of its proper divisors (1).

77990299 is an equidigital number, since it uses as much as digits as its factorization.

77990299 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 642978, while the sum is 52.

The square root of 77990299 is about 8831.2116382748. The cubic root of 77990299 is about 427.2481541611.

The spelling of 77990299 in words is "seventy-seven million, nine hundred ninety thousand, two hundred ninety-nine".