77213803 has 2 divisors, whose sum is σ = 77213804. Its totient is φ = 77213802.

The previous prime is 77213797. The next prime is 77213827. The reversal of 77213803 is 30831277.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77213803 is a prime.

It is not a weakly prime, because it can be changed into another prime (77213603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38606901 + 38606902.

It is an arithmetic number, because the mean of its divisors is an integer number (38606902).

Almost surely, 2^77213803 is an apocalyptic number.

77213803 is a deficient number, since it is larger than the sum of its proper divisors (1).

77213803 is an equidigital number, since it uses as much as digits as its factorization.

77213803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 77213803 is about 8787.1384989654. The cubic root of 77213803 is about 425.8254830434.

The spelling of 77213803 in words is "seventy-seven million, two hundred thirteen thousand, eight hundred three".