1461620437 has 2 divisors, whose sum is σ = 1461620438. Its totient is φ = 1461620436.

The previous prime is 1461620411. The next prime is 1461620449. The reversal of 1461620437 is 7340261641.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 986336836 + 475283601 = 31406^2 + 21801^2 .

It is an emirp because it is prime and its reverse (7340261641) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1461620437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1461620497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 730810218 + 730810219.

It is an arithmetic number, because the mean of its divisors is an integer number (730810219).

Almost surely, 2^1461620437 is an apocalyptic number.

It is an amenable number.

1461620437 is a deficient number, since it is larger than the sum of its proper divisors (1).

1461620437 is an equidigital number, since it uses as much as digits as its factorization.

1461620437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 1461620437 is about 38231.1448559940. The cubic root of 1461620437 is about 1134.8667421032.

It can be divided in two parts, 14616 and 20437, that added together give a palindrome (35053).

The spelling of 1461620437 in words is "one billion, four hundred sixty-one million, six hundred twenty thousand, four hundred thirty-seven".