91427437 has 2 divisors, whose sum is σ = 91427438. Its totient is φ = 91427436.

The previous prime is 91427429. The next prime is 91427519. The reversal of 91427437 is 73472419.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91183401 + 244036 = 9549^2 + 494^2 .

It is a cyclic number.

It is not a de Polignac number, because 91427437 - 2³ = 91427429 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 91427396 and 91427405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91427137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45713718 + 45713719.

It is an arithmetic number, because the mean of its divisors is an integer number (45713719).

Almost surely, 2^91427437 is an apocalyptic number.

It is an amenable number.

91427437 is a deficient number, since it is larger than the sum of its proper divisors (1).

91427437 is an equidigital number, since it uses as much as digits as its factorization.

91427437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 37.

The square root of 91427437 is about 9561.7695538012. The cubic root of 91427437 is about 450.4972889334.

The spelling of 91427437 in words is "ninety-one million, four hundred twenty-seven thousand, four hundred thirty-seven".