1977234451 has 2 divisors, whose sum is σ = 1977234452. Its totient is φ = 1977234450.

The previous prime is 1977234443. The next prime is 1977234461. The reversal of 1977234451 is 1544327791.

It is a weak prime.

It is an emirp because it is prime and its reverse (1544327791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1977234451 - 2³ = 1977234443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1977234398 and 1977234407.

It is not a weakly prime, because it can be changed into another prime (1977234461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 988617225 + 988617226.

It is an arithmetic number, because the mean of its divisors is an integer number (988617226).

Almost surely, 2^1977234451 is an apocalyptic number.

1977234451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1977234451 is an equidigital number, since it uses as much as digits as its factorization.

1977234451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 43.

The square root of 1977234451 is about 44466.1045179359. The cubic root of 1977234451 is about 1255.1223302606.

The spelling of 1977234451 in words is "one billion, nine hundred seventy-seven million, two hundred thirty-four thousand, four hundred fifty-one".